2018 United States Senate election in Montana
The 2018 United States Senate election in Montana was held on November 6, 2018, to elect a member of the United States Senate to represent the State of Montana, concurrently with other elections to the United States Senate, elections to the United States House of Representatives and various state and local elections.
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| Turnout | 71.53% (of registered voters) | ||||||||||||||||
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Tester: 40–50% 50–60% 60–70% 70–80% 80–90% >90% Rosendale: 40–50% 50–60% 60–70% 70–80% 80–90% >90% | |||||||||||||||||
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| Elections in Montana |
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Although Montana went for Donald Trump by a margin of about 20 percent in 2016, incumbent Democratic Senator Jon Tester was reelected to a third term, defeating Republican State Auditor Matt Rosendale. Rosendale conceded on November 7, 2018. This was the first Senate election in which Tester received a majority of votes cast rather than a simple plurality.
Following his loss, Rosendale went on to run for Montana’s vacant congressional seat in 2020 and won, taking office in the U.S. House of Representatives in January 2021.