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Pennsylvania State Senate elections, 2018

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2018 Pennsylvania
Senate elections
Flag of Pennsylvania.png
GeneralNovember 6, 2018
PrimaryMay 15, 2018
Past election results
20162014201220102008
2006200420022000
2018 elections
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Republicans maintained a majority in the state Senate in the November 6, 2018 elections, controlling 29 seats to Democrats' 21. A total of 25 seats out of the chamber's 50 seats were up for election in 2018. Before the election, Republicans had a 33-16 majority.

Pennsylvania maintained its status as a divided government in 2018, with Republicans retaining control of the state Senate and House and Democrats holding the governorship.

Because state senators in Pennsylvania serve four-year terms, winning candidates in this election served through 2022 and played a role in Pennsylvania's redistricting process. In Pennsylvania, congressional district boundaries are drawn by the state legislature. State legislative district lines are drawn by a politician commission. Read more below.

Pennsylvania state senators serve staggered, four-year terms and half of the Senate is up for election every two years.

The Pennsylvania State Senate was one of 87 state legislative chambers with elections in 2018. There are 99 chambers throughout the country.

Democratic Party For more information about the Democratic primary, click here.
Republican Party For more information about the Republican primary, click here.

Post-election analysis

See also: State legislative elections, 2018

The Republican Party maintained control of both chambers of the Pennsylvania General Assembly in the 2018 election, but the Pennsylvania State Senate lost its Republican supermajority status after it no longer held the minimum seats necessary. In the state Senate, 25 out of 50 seats were up for election. The Republican Pennsylvania State Senate majority was reduced from 33-16 to 29-21. One seat was vacant before the election. One Republican incumbent was defeated in the primary and two Republican incumbents were defeated in the general election.

The Pennsylvania House of Representatives held elections for all 203 seats. The Republican majority in the House of Representatives was reduced from 120-79 to 110-93. Four seats were vacant before the election. Three Democratic incumbents were defeated in the primary. Ten incumbents were defeated in the general election; two Democrats and eight Republicans.

National background

On November 6, 2018, 87 of the nation's 99 state legislative chambers held regularly scheduled elections for 6,073 of 7,383 total seats, meaning that nearly 82 percent of all state legislative seats were up for election.

  • Entering the 2018 election, Democrats held 42.6 percent, Republicans held 56.8 percent, and independents and other parties held 0.6 percent of the seats up for regular election.
  • Following the 2018 election, Democrats held 47.3 percent, Republicans held 52.3 percent, and independents and other parties held 0.4 percent of the seats up for regular election.
  • A total of 469 incumbents were defeated over the course of the election cycle, with roughly one-third of them defeated in the primary.

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Candidates

See also: Statistics on state legislative candidates, 2018

General election

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Primary election

Pennsylvania State Senate primary candidates
District Democratic Party

Democrat

Republican Party

Republican

Other
2 Christine Tartaglione (I) Approveda No candidate
4 Art Haywood (I) Approveda James Williams Jr. Approveda
6 Tina Davis Approveda Robert Tomlinson (I) Approveda
8 Anthony Williams (I) Approveda No candidate
10 Steve Santarsiero Approveda Marguerite Quinn Approveda
12 Maria Collett Approveda Stewart Greenleaf Jr. Approveda
14 John Yudichak (I) Approveda No candidate
16 Mark Pinsley Approveda Pat Browne (I) Approveda
18 Lisa Boscola (I) Approveda No candidate
20 No candidate Lisa Baker (I) Approveda
22 John Blake (I) Approveda Frank Scavo III Approveda
24 Linda Fields Approveda Bob Mensch (I) Approveda
26 Timothy Kearney Approveda
Tanner Rouse
Thomas McGarrigle (I) Approveda
28 Shawn Mauck
Judith McCormick Higgins Approveda
Kristin Hill Approveda
Julie Wheeler
30 Emily Garbuny Best Approveda Daniel Kiss
Judith Ward Approveda
32 Pamela Gerard Approveda Patrick Stefano (I) Approveda
34 Ezra Nanes Approveda Jake Corman (I) Approveda
36 William Troutman Jr. Approveda Ryan Aument (I) Approveda
38 Stephanie Walsh
Lindsey Williams Approveda
Randy Vulakovich (I)
Jeremy Shaffer Approveda
40 Tarah Probst Approveda Mario Scavello (I) Approveda
42 Wayne Fontana (I) Approveda No candidate
44 Katie Muth Approveda John Rafferty (I) Approveda
46 James Craig Approveda Camera Bartolotta (I) Approveda
48 Lois Herr Approveda Mike Folmer (I) Approveda
50 Sue Mulvey Approveda Michele Brooks (I) Approveda
Notes • An (I) denotes an incumbent.
• Candidate lists can change frequently throughout an election season. Ballotpedia staff update this list monthly. To suggest changes, click here to email our State Legislature Project.

Margins of victory

See also: Margin of victory analysis for the 2018 state legislative elections

A margin of victory (MOV) analysis for the 2018 Pennsylvania State Senate races is presented in this section. MOV represents the percentage of total votes that separated the winner and the second-place finisher. For example, if the winner of a race received 47 percent of the vote and the second-place finisher received 45 percent of the vote, the MOV is 2 percent.

The table below presents the following figures for each party:

  • Elections won
  • Elections won by less than 10 percentage points
  • Elections won without opposition
  • Average margin of victory[1]
Pennsylvania State Senate: 2018 Margin of Victory Analysis
Party Elections won Elections won by less than 10% Unopposed elections Average margin of victory[1]
Democratic Party Democratic
12
5
5
17.1%
Republican Party Republican
13
3
0
23.6%
Grey.png Other
0
0
0
N/A
Total
25
8
5
20.3%



The margin of victory in each race is presented below. The list is sorted from the closest MOV to the largest (including unopposed races).

Pennsylvania State Senate: 2018 Margin of Victory by District
District Winning Party Losing Party Margin of Victory
Pennsylvania State Senate District 6
Ends.png Republican
Electiondot.png Democratic
0.1%
Pennsylvania State Senate District 38
Electiondot.png Democratic
Ends.png Republican
0.6%
Pennsylvania State Senate District 16
Ends.png Republican
Electiondot.png Democratic
2.8%
Pennsylvania State Senate District 44
Electiondot.png Democratic
Ends.png Republican
3.9%
Pennsylvania State Senate District 24
Ends.png Republican
Electiondot.png Democratic
4.8%
Pennsylvania State Senate District 10
Electiondot.png Democratic
Ends.png Republican
5.1%
Pennsylvania State Senate District 12
Electiondot.png Democratic
Ends.png Republican
5.4%
Pennsylvania State Senate District 26
Electiondot.png Democratic
Ends.png Republican
8.6%
Pennsylvania State Senate District 34
Ends.png Republican
Electiondot.png Democratic
11.5%
Pennsylvania State Senate District 40
Ends.png Republican
Electiondot.png Democratic
12.6%
Pennsylvania State Senate District 46
Ends.png Republican
Electiondot.png Democratic
17.6%
Pennsylvania State Senate District 22
Electiondot.png Democratic
Ends.png Republican
22.7%
Pennsylvania State Senate District 28
Ends.png Republican
Electiondot.png Democratic
25.4%
Pennsylvania State Senate District 48
Ends.png Republican
Electiondot.png Democratic
25.9%
Pennsylvania State Senate District 50
Ends.png Republican
Electiondot.png Democratic
31.3%
Pennsylvania State Senate District 32
Ends.png Republican
Electiondot.png Democratic
31.5%
Pennsylvania State Senate District 36
Ends.png Republican
Electiondot.png Democratic
32.9%
Pennsylvania State Senate District 30
Ends.png Republican
Electiondot.png Democratic
45.7%
Pennsylvania State Senate District 20
Ends.png Republican
Begins.png Green Party
64.6%
Pennsylvania State Senate District 4
Electiondot.png Democratic
Ends.png Republican
73.2%
Pennsylvania State Senate District 14
Electiondot.png Democratic
None
Unopposed
Pennsylvania State Senate District 18
Electiondot.png Democratic
None
Unopposed
Pennsylvania State Senate District 42
Electiondot.png Democratic
None
Unopposed
Pennsylvania State Senate District 8
Electiondot.png Democratic
None
Unopposed
Pennsylvania State Senate District 2
Electiondot.png Democratic
None
Unopposed


Seats flipped

See also: State legislative seats that changed party control, 2018

The below map displays each seat in the Pennsylvania State Senate which changed partisan hands as a result of the 2018 elections, shaded according to the partisan affiliation of the winner in 2018. Hover over a shaded district for more information.

State legislative seats flipped in 2018, Pennsylvania State Senate
District Incumbent 2018 winner Direction of flip
Pennsylvania State Senate District 10 Republican Party Charles McIlhinney Democratic Party Steve Santarsiero R to D
Pennsylvania State Senate District 12 Republican Party Stewart Greenleaf Democratic Party Maria Collett R to D
Pennsylvania State Senate District 26 Republican Party Thomas McGarrigle Democratic Party Timothy Kearney R to D
Pennsylvania State Senate District 38 Republican Party Randy Vulakovich Democratic Party Lindsey Williams R to D
Pennsylvania State Senate District 44 Republican Party John Rafferty Democratic Party Katie Muth R to D

Incumbents retiring

Four incumbents did not run for re-election in 2018.[2] Those incumbents were:

Name Party Office
Charles McIlhinney Ends.png Republican Senate District 10
Stewart Greenleaf Ends.png Republican Senate District 12
Scott Wagner Ends.png Republican Senate District 28
John Eichelberger Ends.png Republican Senate District 30

Process to become a candidate

See also: Ballot access requirements for political candidates in Pennsylvania

Generally speaking, there are two types of petition forms that prospective candidates may need to file in order to gain access to the ballot.

  1. Nomination petitions: These are the petition forms used by political party candidates.
  2. Nomination papers: These are the petition forms used by independent and political party designation candidates.

For party candidates

DocumentIcon.jpg See statutes: Pennsylvania Election Code, Chapter 14, Article 9

Party candidates for state office must file nomination petitions with the Pennsylvania Secretary of State. Signature requirements are summarized below (for more information regarding nomination petitions, see "Nomination petitions" below).[3]

Nomination petition signature requirements in Pennsylvania
Office sought Required signatures
U.S. Senator 2,000
U.S. House Representative 1,000
Governor 2,000 (with at least 100 from a minimum of 10 counties)
Lt. Governor 1,000 (with at least 100 from a minimum of five counties)
State senator 500
State representative 300

Each candidate must file a candidate affidavit with his or her nomination petition. The affidavit must include the candidate's address, election district, the name of the office being sought, a statement verifying the candidate's eligibility for said office, and a statement verifying that the candidate will not "knowingly violate any provision of this act [i.e., the election code], or of any law regulating and limiting nomination and election expenses and prohibiting corrupt practices in connection therewith."[4]

The candidate must also pay a filing fee. Filing fees must be submitted with nomination petitions. Fees are summarized in the table below.[5]

Filing fees in Pennsylvania
Office sought Fee
United States Senator, governor, lieutenant governor, treasurer, auditor general, attorney general $200
United States Representative $150
State legislator $100

In addition, a candidate for state office must file a statement of financial interests with the state ethics commission. A copy of this statement must be attached to the nomination petition submitted to the Pennsylvania Secretary of State, as well.

For other candidates

DocumentIcon.jpg See statutes: Article 9, Part (b) of the Pennsylvania Election Code

Like party candidates participating in the primary, independent, minor political party, and political body candidates for state office (including the Pennsylvania General Assembly) must submit candidate affidavits and statements of financial interests to the Pennsylvania Secretary of State. Candidates must also pay the same filing fees as primary candidates. Independent, minor party, and political body candidates must also file nomination papers (not to be confused with the nomination petitions party candidates participating in the primary must complete). Candidates filing nomination papers for office elected by district must obtain signatures from electors of the district equal to at least 2 percent of the largest entire vote cast for an elected candidate in the last election within the district.[6] Candidates filing nomination papers for most statewide offices must gather 2,500 signatures. For President of the United States, U.S. Senate, and governor, candidates must gather 5,000 signatures.[6][7]

For write-in candidates

Pennsylvania does not require write-in candidates to file paperwork in order to have their votes tallied.

Qualifications

See also: State legislature candidate requirements by state

Under Article II of the Pennsylvania Constitution, Senators shall be at least twenty-five years of age and Representatives twenty-one years of age. They shall have been citizens and inhabitants of their respective districts one year next before their election (unless absent on the public business of the United States or of this State) and shall reside in their respective districts during their terms of service.

Salaries and per diem

See also: Comparison of state legislative salaries
State legislative salaries, 2024[8]
SalaryPer diem
$106,422.33/year$185/day

When sworn in

See also: When state legislators assume office after a general election

Pennsylvania legislators assume office on the first day of December after a general election.[9]

Pennsylvania political history

See also: Partisan composition of state senates and State government trifectas

Party control

2018

In the 2018 elections, the Republican majority in the Pennsylvania State Senate was reduced from 33-16 to 29-21.

Pennsylvania State Senate
Party As of November 6, 2018 After November 7, 2018
     Democratic Party 16 21
     Republican Party 33 29
     Vacancy 1 0
Total 50 50

2016

In the 2016 elections, Republicans increased their majority in the Pennsylvania State Senate from 31-19 to 34-16.

Pennsylvania State Senate
Party As of November 7, 2016 After November 8, 2016
     Democratic Party 19 16
     Republican Party 31 34
Total 50 50

Trifectas

A state government trifecta is a term that describes single-party government, when one political party holds the governor's office and has majorities in both chambers of the legislature in a state government. Democratic Governor Tom Wolf won election in 2014, moving Pennsylvania's state government to divided control. Prior to that, Republicans controlled a trifecta resulting from the 2010 elections.

Pennsylvania Party Control: 1992-2025
One year of a Democratic trifecta  •  Twelve years of Republican trifectas
Scroll left and right on the table below to view more years.

Year 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
Governor D D D R R R R R R R R D D D D D D D D R R R R D D D D D D D D D D D
Senate R D R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R
House D D D R R R R R R R R R R R R D D D D R R R R R R R R R R R R D D _

Wave election analysis

See also: Wave elections (1918-2016)

The term wave election is frequently used to describe an election cycle in which one party makes significant electoral gains. How many seats would Republicans have had to lose for the 2018 midterm election to be considered a wave election?

Ballotpedia examined the results of the 50 election cycles that occurred between 1918 and 2016—spanning from President Woodrow Wilson's (D) second midterm in 1918 to Donald Trump's (R) first presidential election in 2016. We define wave elections as the 20 percent of elections in that period resulting in the greatest seat swings against the president's party.

Applying this definition to state legislative elections, we found that Republicans needed to lose 494 seats for 2018 to qualify as a wave election.

The chart below shows the number of seats the president's party lost in the 10 state legislative waves from 1918 to 2016. Click here to read the full report.

State legislative wave elections
Year President Party Election type State legislative seats change Elections analyzed[10]
1932 Hoover R Presidential -1,022 7,365
1922 Harding R First midterm -907 6,907
1966 Johnson D First midterm[11] -782 7,561
1938 Roosevelt D Second midterm -769 7,179
1958 Eisenhower R Second midterm -702 7,627
2010 Obama D First midterm -702 7,306
1974 Ford R Second midterm[12] -695 7,481
1920 Wilson D Presidential -654 6,835
1930 Hoover R Presidential -640 7,361
1954 Eisenhower R First midterm -494 7,513

Competitiveness

Every year, Ballotpedia uses official candidate lists from each state to examine the competitiveness of every state legislative race in the country. Nationally, there has been a steady decline in electoral competitiveness since 2010. Most notable is that the number of districts with general election competition has dropped by more than 10 percent.

Results from 2016

Click here to read the full study »


Historical context

See also: Competitiveness in State Legislative Elections: 1972-2014

Uncontested elections: In 2014, 32.8 percent of Americans lived in states with an uncontested state senate election. Similarly, 40.4 percent of Americans lived in states with uncontested house elections. Primary elections were uncontested even more frequently, with 61 percent of people living in states with no contested primaries. Uncontested elections often occur in locations that are so politically one-sided that the result of an election would be a foregone conclusion regardless of whether it was contested or not.

F5 Pop. % with uncontested state legislative races.png

Open seats: In most cases, an incumbent will run for re-election, which decreases the number of open seats available. In 2014, 83 percent of the 6,057 seats up for election saw the incumbent running for re-election. The states that impose term limits on their legislatures typically see a higher percentage of open seats in a given year because a portion of incumbents in each election are forced to leave office. Overall, the number of open seats decreased from 2012 to 2014, dropping from 21.2 percent in 2012 to 17.0 percent in 2014.

Incumbent win rates: Ballotpedia's competitiveness analysis of elections between 1972 and 2014 documented the high propensity for incumbents to win re-election in state legislative elections. In fact, since 1972, the win rate for incumbents had not dropped below 90 percent—with the exception of 1974, when 88 percent of incumbents were re-elected to their seats. Perhaps most importantly, the win rate for incumbents generally increased over time. In 2014, 96.5 percent of incumbents were able to retain their seats. Common convention holds that incumbents are able to leverage their office to maintain their seat. However, the high incumbent win rate may actually be a result of incumbents being more likely to hold seats in districts that are considered safe for their party.

Marginal primaries: Often, competitiveness is measured by examining the rate of elections that have been won by amounts that are considered marginal (5 percent or less). During the 2014 election, 90.1 percent of primary and general election races were won by margins higher than 5 percent. Interestingly, it is usually the case that only one of the two races—primary or general—will be competitive at a time. This means that if a district's general election is competitive, typically one or more of the district's primaries were won by more than 5 percent. The reverse is also true: If a district sees a competitive primary, it is unlikely that the general election for that district will be won by less than 5 percent. Primaries often see very low voter turnout in comparison to general elections. In 2014, there were only 27 million voters for state legislative primaries, but approximately 107 million voters for the state legislative general elections.

Redistricting in Pennsylvania

See also: Redistricting in Pennsylvania

Because state senators in Pennsylvania serve four-year terms, winning candidates in this election served through 2022 and played a role in Pennsylvania's redistricting process. In Pennsylvania, congressional district boundaries are drawn by the state legislature. State legislative district lines are drawn by a politician commission.

State legislature districts in the 2010-2012 redistricting process

On October 31, 2011, the politician redistricting commission issued its state legislative district proposal. The commission approved the proposal by a 4-1 vote on December 12, 2011. On January 25, 2012, the Pennsylvania Supreme Court struck the map down, ruling that "the lines violated state constitutional requirements of compactness and adherence to the integrity of political subdivisions." The court ordered the commission to redraw the map. The court further ordered that the state legislative district map adopted during the 2000 redistricting cycle would apply to elections taking place in 2012.[13][14]

On June 8, 2012, the redistricting commission released its amended state legislative district proposal. This map was also subject to court challenges, but these were dismissed by the Pennsylvania Supreme Court on May 8, 2013. The new map took effect in 2014.[13][14]

Pivot Counties

See also: Pivot Counties by state

Three of 67 Pennsylvania counties—4.5 percent—are pivot counties. These are counties that voted for Barack Obama (D) in 2008 and 2012 and for Donald Trump (R) in 2016. Altogether, the nation had 206 pivot counties, with most being concentrated in upper midwestern and northeastern states.

Counties won by Trump in 2016 and Obama in 2012 and 2008
County Trump margin of victory in 2016 Obama margin of victory in 2012 Obama margin of victory in 2008
Erie County, Pennsylvania 1.56% 16.03% 19.88%
Luzerne County, Pennsylvania 19.31% 4.81% 8.41%
Northampton County, Pennsylvania 3.78% 4.71% 12.30%

In the 2016 presidential election, Donald Trump (R) won Pennsylvania with 48.2 percent of the vote. Hillary Clinton (D) received 47.5 percent. In presidential elections between 1900 and 2016, Pennsylvania cast votes for the winning presidential candidate 76.7 percent of the time. In that same time frame, Pennsylvania supported Republican candidates for president more often than Democratic candidates, 53.3 to 43.3 percent. The state, however, favored Democrats in every presidential election between 2000 and 2012, but voted Republican in 2016.

Presidential results by legislative district

The following table details results of the 2012 and 2016 presidential elections by state Senate districts in Pennsylvania. Click [show] to expand the table. The "Obama," "Romney," "Clinton," and "Trump" columns describe the percent of the vote each presidential candidate received in the district. The "2012 Margin" and "2016 Margin" columns describe the margin of victory between the two presidential candidates in those years. The "Party Control" column notes which party held that seat heading into the 2018 general election. Data on the results of the 2012 and 2016 presidential elections broken down by state legislative districts was compiled by Daily Kos.[15][16]

In 2012, Barack Obama (D) won 23 out of 50 state Senate districts in Pennsylvania with an average margin of victory of 30 points. In 2016, Hillary Clinton (D) won 23 out of 50 state Senate districts in Pennsylvania with an average margin of victory of 27.6 points. Clinton won nine districts controlled by Republicans heading into the 2018 elections.
In 2012, Mitt Romney (R) won 27 out of 50 state Senate districts in Pennsylvania with an average margin of victory of 17.8 points. In 2016, Donald Trump (R) won 27 out of 50 state Senate districts in Pennsylvania with an average margin of victory of 27.4 points. Trump won two districts controlled by Democrats heading into the 2018 elections.

See also

External links

Footnotes

  1. 1.0 1.1 Excludes unopposed elections
  2. Ballotpedia defines an incumbent as retiring if the incumbent did not file for office or filed for office but withdrew, was disqualified, or otherwise left a race in a manner other than losing the primary, primary runoff, or convention. If an incumbent runs as a write-in candidate, Ballotpedia does not consider them to be retiring. If an incumbent runs in the same chamber for a different seat, Ballotpedia does not consider them to be retiring.
  3. Pennsylvania Election Code, "25 Pa. Stat. § 2872.1 (2022)," accessed May 30, 2023
  4. Pennsylvania Election Code, "25 P.S. § 2870," accessed April 25, 2025
  5. Pennsylvania Election Code, "25 P.S. § 2873," accessed April 25, 2025
  6. 6.0 6.1 Pennsylvania Department of State, "Instructions for filing as a candidate of a political body 2025 municipal election," accessed April 25, 2025
  7. Pennsylvania Election Code, "25 Pa. Stat. § 2872.2 (2022)," accessed April 25, 2025
  8. National Conference of State Legislatures, "2024 Legislator Compensation," August 21, 2024
  9. Pennsylvania Constitution, "Article II, Section 2," accessed November 1, 2021
  10. The number of state legislative seats available for analysis varied, with as many as 7,795 and as few as 6,835.
  11. Lyndon Johnson's (D) first term began in November 1963 after the death of President John F. Kennedy (D), who was first elected in 1960. Before Johnson had his first midterm in 1966, he was re-elected president in 1964.
  12. Gerald Ford's (R) first term began in August 1974 following the resignation of President Richard Nixon (R), who was first elected in 1968 and was re-elected in 1972. Because Ford only served for two full months before facing the electorate, this election is classified as Nixon's second midterm.
  13. 13.0 13.1 All About Redistricting, "Pennsylvania," accessed May 8, 2015
  14. 14.0 14.1 All About Redistricting, "Litigation in the 2010 cycle, Pennsylvania," accessed May 8, 2015
  15. Daily Kos, "Daily Kos Elections' statewide election results by congressional and legislative districts," July 9, 2013
  16. Daily Kos, "Daily Kos Elections' 2016 presidential results for congressional and legislative districts," February 6, 2017


Current members of the Pennsylvania State Senate
Leadership
Majority Leader:Joe Pittman
Minority Leader:Jay Costa
Senators
District 1
District 2
District 3
District 4
District 5
District 6
District 7
District 8
District 9
John Kane (D)
District 10
District 11
District 12
District 13
District 14
District 15
Patty Kim (D)
District 16
District 17
District 18
District 19
District 20
District 21
District 22
District 23
Gene Yaw (R)
District 24
District 25
Cris Dush (R)
District 26
District 27
District 28
District 29
District 30
District 31
District 32
District 33
District 34
District 35
District 36
District 37
District 38
District 39
Kim Ward (R)
District 40
District 41
District 42
District 43
Jay Costa (D)
District 44
District 45
District 46
District 47
District 48
District 49
District 50
Republican Party (27)
Democratic Party (23)