Who Mike Rounds votes with
Across 1909 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 |
|---|---|---|
| Alan Armstrong | R | 100.0% (134/134) |
| James C. Justice | R | 99.1% (758/765) |
| Bernie Moreno | R | 98.9% (786/795) |
| Jim Banks | R | 98.9% (779/788) |
| David McCormick | R | 98.8% (766/775) |
| Tim Sheehy | R | 98.8% (767/776) |
| John R. Curtis | R | 98.6% (771/782) |
| Jon Husted | R | 98.4% (781/794) |
| Ashley Moody | R | 98.2% (771/785) |
| Pete Ricketts | R | 91.9% (1186/1290) |
| Katie Boyd Britt | R | 91.5% (1158/1266) |
| Shelley Moore Capito | R | 91.4% (1711/1872) |
| Todd Young | R | 90.8% (1709/1883) |
| John Cornyn | R | 90.3% (1687/1869) |
| Ted Budd | R | 90.3% (1157/1281) |
| Eric Schmitt | R | 90.0% (1161/1290) |
| Mitch McConnell | R | 90.0% (1602/1780) |
| Chuck Grassley | R | 89.4% (1687/1886) |
| Roger F. Wicker | R | 89.4% (1670/1869) |
| Jerry Moran | R | 89.2% (1591/1784) |
Least often with
| Member | Party | Agreement |
|---|---|---|
| Lisa Blunt Rochester | D | 1.6% (13/793) |
| Angela D. Alsobrooks | D | 3.3% (26/785) |
| Andy Kim | D | 5.2% (42/806) |
| Adam B. Schiff | D | 5.7% (45/787) |
| Elissa Slotkin | D | 8.9% (69/779) |
| Ruben Gallego | D | 9.5% (67/702) |
| Peter Welch | D | 11.4% (145/1273) |
| Bernard Sanders | I | 13.1% (231/1760) |
| Jeff Merkley | D | 14.2% (264/1857) |
| Chris Van Hollen | D | 14.4% (266/1844) |
| Ron Wyden | D | 14.5% (273/1882) |
| Edward J. Markey | D | 14.5% (272/1877) |
| Elizabeth Warren | D | 14.6% (275/1888) |
| Christopher Murphy | D | 14.6% (272/1869) |
| Patty Murray | D | 14.8% (273/1845) |
| Ben Ray Luján | D | 15.0% (278/1850) |
| Tammy Baldwin | D | 15.1% (287/1896) |
| Maria Cantwell | D | 15.1% (288/1903) |
| Mazie K. Hirono | D | 15.2% (289/1900) |
| Tina Smith | D | 15.3% (283/1853) |
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.