Elections / 2018 · Senate · MT
Montana — 2018 U.S. Senate election
Recent presidential results
Akashicstate2018 Senate electionMontana · U.S. SenateTesterD+3.6
How it voted
Share of the 2018 vote
| Jon Tester (i) ✓Democrat | 50.3% | 253,876 |
|---|---|---|
| Matt RosendaleRepublican | 46.8% | 235,963 |
| Rick BreckenridgeLibertarian | 2.9% | 14,545 |
2018Senate margin
D+60R+60
56 counties, each filled by 2018 D-vs-R margin. Hover any county for its result.
County-level results (56 counties) — table
| County | Winner | Margin |
|---|---|---|
| BEAVERHEAD, MT | Republican | R+20.2 |
| BIG HORN, MT | Democratic | D+31.4 |
| BLAINE, MT | Democratic | D+32.4 |
| BROADWATER, MT | Republican | R+31.1 |
| CARBON, MT | Republican | R+8.7 |
| CARTER, MT | Republican | R+63.0 |
| CASCADE, MT | Democratic | D+5.5 |
| CHOUTEAU, MT | Republican | R+1.4 |
| CUSTER, MT | Republican | R+16.8 |
| DANIELS, MT | Republican | R+37.2 |
| DAWSON, MT | Republican | R+36.0 |
| DEER LODGE, MT | Democratic | D+39.8 |
| FALLON, MT | Republican | R+52.0 |
| FERGUS, MT | Republican | R+28.9 |
| FLATHEAD, MT | Republican | R+14.9 |
| GALLATIN, MT | Democratic | D+21.5 |
| GARFIELD, MT | Republican | R+71.8 |
| GLACIER, MT | Democratic | D+52.1 |
| GOLDEN VALLEY, MT | Republican | R+38.1 |
| GRANITE, MT | Republican | R+19.6 |
| HILL, MT | Democratic | D+20.3 |
| JEFFERSON, MT | Republican | R+10.2 |
| JUDITH BASIN, MT | Republican | R+30.6 |
| LAKE, MT | Democratic | D+3.1 |
| LEWIS AND CLARK, MT | Democratic | D+18.0 |
| LIBERTY, MT | Republican | R+22.5 |
| LINCOLN, MT | Republican | R+34.6 |
| MADISON, MT | Republican | R+20.3 |
| MCCONE, MT | Republican | R+53.1 |
| MEAGHER, MT | Republican | R+31.8 |
| MINERAL, MT | Republican | R+19.2 |
| MISSOULA, MT | Democratic | D+37.4 |
| MUSSELSHELL, MT | Republican | R+48.1 |
| PARK, MT | Democratic | D+7.8 |
| PETROLEUM, MT | Republican | R+60.9 |
| PHILLIPS, MT | Republican | R+40.8 |
| PONDERA, MT | Republican | R+8.8 |
| POWDER RIVER, MT | Republican | R+56.0 |
| POWELL, MT | Republican | R+22.3 |
| PRAIRIE, MT | Republican | R+41.8 |
| RAVALLI, MT | Republican | R+19.1 |
| RICHLAND, MT | Republican | R+43.4 |
| ROOSEVELT, MT | Democratic | D+19.4 |
| ROSEBUD, MT | Republican | R+7.5 |
| SANDERS, MT | Republican | R+29.0 |
| SHERIDAN, MT | Republican | R+16.8 |
| SILVER BOW, MT | Democratic | D+45.5 |
| STILLWATER, MT | Republican | R+35.1 |
| SWEET GRASS, MT | Republican | R+34.3 |
| TETON, MT | Republican | R+15.6 |
| TOOLE, MT | Republican | R+30.6 |
| TREASURE, MT | Republican | R+36.2 |
| VALLEY, MT | Republican | R+15.2 |
| WHEATLAND, MT | Republican | R+29.0 |
| WIBAUX, MT | Republican | R+46.1 |
| YELLOWSTONE, MT | Republican | R+3.5 |
presidential baselinePresident 2016R+20.2Senate 2018D+3.6vs. baselineD+23.8
Montana's 2018 Senate race ran 23.8 points more Democratic than its 2016 presidential margin.
Montana's Senate margins
Every contest in our store, 1976–2024
| Year | Margin (D minus R) |
|---|---|
| 1976 | +28.3% |
| 1978 | +11.4% |
| 1982 | +12.8% |
| 1984 | +16.2% |
| 1988 | −3.7% |
| 1990 | +38.7% |
| 1994 | −24.7% |
| 1996 | +4.9% |
| 2000 | −3.3% |
| 2002 | +31.0% |
| 2006 | +0.9% |
| 2008 | +45.8% |
| 2012 | +3.7% |
| 2014 | −17.7% |
| 2018 | +3.6% |
| 2020 | −10.0% |
| 2024 | −7.1% |
Same ballot, 2018MT
Source. MIT Election Data + Science Lab — 2018 US Senate returns, party-classified by literal ballot party · county returns aggregated from precinct-level results. Real returns — nothing estimated.