Congress is out of session until Monday, November 9 for the midterm campaign. No new roll-call votes until then; the last were the House on Sep 16 and the Senate on Sep 30.

People / Rankings / Breaks with party

Which members of the Senate break with their party most often?

John Fetterman broke with Democrats most often among the 99 Senate members in the 119th Congress: on 20.5% of party-line votes (median for Senate members 0.8%), as of Nov 2, 2026.

Source: Voteview roll calls (UCLA) · How we measure · Updated Nov 2, 2026

Other rankings
Which members of the Senate break with their party most often?
RankMemberAgainst own party
1DJohn Fetterman PA Senate20.5% 161 of 787
2RSusan M. Collins ME Senate16.7% 140 of 840
3RLisa Murkowski AK Senate14.7% 118 of 804
4DJeanne Shaheen NH Senate14.4% 116 of 805
5IAngus S. King, Jr. ME Senate12.8% 106 of 827
6DMargaret Wood Hassan NH Senate12.7% 105 of 827
7RRand Paul KY Senate11.8% 94 of 798
8DJacky Rosen NV Senate10.4% 86 of 827
9DTim Kaine VA Senate9.9% 82 of 829
10DMark R. Warner VA Senate9.7% 78 of 804
11DMark Kelly AZ Senate8.6% 68 of 792
12DCatherine Cortez Masto NV Senate8.4% 69 of 825
13DRuben Gallego AZ Senate8.1% 60 of 738
14DElissa Slotkin MI Senate7.6% 62 of 818
15DRichard J. Durbin IL Senate6.5% 53 of 816
16DMartin Heinrich NM Senate6.1% 49 of 806
17DChristopher A. Coons DE Senate5.9% 47 of 793
18DAmy Klobuchar MN Senate5.8% 48 of 827
19DJack Reed RI Senate5.4% 45 of 832
20DGary C. Peters MI Senate5.2% 43 of 823
21DJohn W. Hickenlooper CO Senate5.1% 42 of 830
22DRaphael G. Warnock GA Senate5.0% 41 of 817
23DSheldon Whitehouse RI Senate4.9% 40 of 809
24DAdam B. Schiff CA Senate4.5% 37 of 821
25DKirsten E. Gillibrand NY Senate4.4% 36 of 822
26RJosh Hawley MO Senate4.3% 35 of 807
27DAndy Kim NJ Senate4.1% 34 of 832
T-28DJon Ossoff GA Senate3.9% 31 of 794
T-28RDan Sullivan AK Senate3.9% 32 of 815
T-30RMitch McConnell KY Senate3.5% 25 of 724
T-30RThom Tillis NC Senate3.5% 26 of 733
T-32DMichael F. Bennet CO Senate3.0% 23 of 764
T-32DPeter Welch VT Senate3.0% 24 of 798
34DCory A. Booker NJ Senate2.9% 23 of 804
35DBen Ray Luján NM Senate2.4% 20 of 828
T-36DMaria Cantwell WA Senate2.3% 19 of 838
T-36RJohn Thune SD Senate2.3% 19 of 839
38DAngela D. Alsobrooks MD Senate2.2% 18 of 826
T-39DTammy Baldwin WI Senate2.1% 18 of 839
T-39RBill Cassidy LA Senate2.1% 17 of 797
T-41DTammy Duckworth IL Senate1.7% 13 of 785
T-41DAlex Padilla CA Senate1.7% 14 of 811
43RJerry Moran KS Senate1.5% 12 of 789
T-44DMazie K. Hirono HI Senate1.3% 11 of 836
T-44DBrian Schatz HI Senate1.3% 11 of 830
T-46DRichard Blumenthal CT Senate1.2% 10 of 829
T-46DCharles E. Schumer NY Senate1.2% 10 of 836
T-48RMike Rounds SD Senate1.0% 8 of 832
T-48RRoger F. Wicker MS Senate1.0% 8 of 812
T-50RJohn Boozman AR Senate0.8% 7 of 827
T-50RJon Husted OH Senate0.8% 7 of 835
T-52RShelley Moore Capito WV Senate0.7% 6 of 824
T-52RCindy Hyde-Smith MS Senate0.7% 6 of 824
T-54RDeb Fischer NE Senate0.6% 5 of 831
T-54RChuck Grassley IA Senate0.6% 5 of 819
T-54RJohn Kennedy LA Senate0.6% 5 of 824
T-54RMike Lee UT Senate0.6% 5 of 813
T-58DLisa Blunt Rochester DE Senate0.5% 4 of 835
T-58RKevin Cramer ND Senate0.5% 4 of 810
T-58DJeff Merkley OR Senate0.5% 4 of 833
T-58RAshley Moody FL Senate0.5% 4 of 826
T-58RRick Scott FL Senate0.5% 4 of 838
T-58DRon Wyden OR Senate0.5% 4 of 823
T-58RTodd Young IN Senate0.5% 4 of 833
T-65RTed Budd NC Senate0.4% 3 of 815
T-65RPete Ricketts NE Senate0.4% 3 of 832
67RTommy Tuberville AL Senate0.3% 2 of 783
T-68RKatie Boyd Britt AL Senate0.2% 2 of 819
T-68RTom Cotton AR Senate0.2% 2 of 828
T-68RJohn R. Curtis UT Senate0.2% 2 of 822
T-68RJoni Ernst IA Senate0.2% 2 of 822
T-68RJohn Hoeven ND Senate0.2% 2 of 832
T-68RRon Johnson WI Senate0.2% 2 of 828
T-68RJames Lankford OK Senate0.2% 2 of 837
T-68DEdward J. Markey MA Senate0.2% 2 of 834
T-68DChristopher Murphy CT Senate0.2% 2 of 817
T-68RTim Sheehy MT Senate0.2% 2 of 817
T-68DElizabeth Warren MA Senate0.2% 2 of 826
T-79RJim Banks IN Senate0.1% 1 of 830
T-79RJohn Barrasso WY Senate0.1% 1 of 836
T-79RMike Crapo ID Senate0.1% 1 of 829
T-79RTed Cruz TX Senate0.1% 1 of 798
T-79RSteve Daines MT Senate0.1% 1 of 815
T-79RJames C. Justice WV Senate0.1% 1 of 807
T-79RCynthia M. Lummis WY Senate0.1% 1 of 813
T-79RDavid McCormick PA Senate0.1% 1 of 814
T-79DPatty Murray WA Senate0.1% 1 of 795
T-79IBernard Sanders VT Senate0.1% 1 of 778
T-79REric Schmitt MO Senate0.1% 1 of 829
T-79RTim Scott SC Senate0.1% 1 of 818
T-91RAlan Armstrong OK Senate0.0% 0 of 169
T-91RMarsha Blackburn TN Senate0.0% 0 of 793
T-91RJohn Cornyn TX Senate0.0% 0 of 832
T-91RBill Hagerty TN Senate0.0% 0 of 811
T-91RRoger Marshall KS Senate0.0% 0 of 832
T-91RBernie Moreno OH Senate0.0% 0 of 837
T-91RJames E. Risch ID Senate0.0% 0 of 816
T-91DTina Smith MN Senate0.0% 0 of 798
T-91DChris Van Hollen MD Senate0.0% 0 of 826

1 member with fewer than 100 roll calls in this Congress is left out until their record is long enough to compare. Independents are ranked with the party they caucus with. Members tied on the shown value share a rank and are listed by name.