Who Susan M. Collins votes with
Across 2094 divided votes — ones where both sides drew a real bloc. Unanimous votes are excluded: everyone agrees with everyone on those, so counting them would measure attendance rather than agreement.
Most often with
| Member | Party | Agreement |
|---|---|---|
| Lisa Murkowski | R | 88.6% (1763/1990) |
| Jon Husted | R | 84.0% (674/802) |
| Ashley Moody | R | 83.5% (662/793) |
| Bernie Moreno | R | 83.3% (669/803) |
| David McCormick | R | 83.2% (649/780) |
| Jim Banks | R | 83.2% (662/796) |
| James C. Justice | R | 83.1% (642/773) |
| Tim Sheehy | R | 83.1% (651/783) |
| John R. Curtis | R | 82.9% (653/788) |
| Mike Rounds | R | 71.1% (1358/1909) |
| Thom Tillis | R | 70.9% (1345/1897) |
| Pete Ricketts | R | 69.1% (913/1321) |
| Shelley Moore Capito | R | 68.9% (1406/2042) |
| Alan Armstrong | R | 67.4% (93/138) |
| Katie Boyd Britt | R | 67.4% (874/1296) |
| Ted Budd | R | 67.4% (884/1312) |
| Eric Schmitt | R | 67.1% (887/1321) |
| Todd Young | R | 66.5% (1368/2058) |
| Chuck Grassley | R | 66.3% (1373/2071) |
| Mitch McConnell | R | 65.3% (1276/1954) |
Least often with
| Member | Party | Agreement |
|---|---|---|
| Lisa Blunt Rochester | D | 16.7% (134/801) |
| Angela D. Alsobrooks | D | 18.9% (150/793) |
| Andy Kim | D | 20.6% (168/814) |
| Adam B. Schiff | D | 21.3% (169/795) |
| Elissa Slotkin | D | 24.2% (190/785) |
| Ruben Gallego | D | 26.1% (185/710) |
| Peter Welch | D | 35.8% (466/1302) |
| Bernard Sanders | I | 41.2% (790/1918) |
| John Fetterman | D | 42.8% (502/1172) |
| Edward J. Markey | D | 43.2% (890/2061) |
| Jeff Merkley | D | 43.3% (884/2042) |
| Elizabeth Warren | D | 43.8% (909/2073) |
| Chris Van Hollen | D | 43.9% (888/2024) |
| Patty Murray | D | 44.0% (891/2024) |
| Ron Wyden | D | 44.2% (912/2062) |
| Mazie K. Hirono | D | 44.2% (921/2085) |
| Christopher Murphy | D | 44.2% (908/2054) |
| Ben Ray Luján | D | 44.3% (895/2020) |
| Tina Smith | D | 44.4% (905/2038) |
| Maria Cantwell | D | 44.5% (926/2083) |
Only members with at least 20 comparable votes are listed. Agreement is not endorsement and not coordination — two members can vote the same way for opposite reasons, and the record almost never says why.