Park County, Mont.

Park County, Mont.

Photographer: Tailyr Irvine for Bloomberg Businessweek

Heated Montana Race Could Flip the Senate to Democrats

The state defies voting trends and often splits tickets with its votes for the upper house.

Montana’s Battle of the Steves started at the buzzer. On the morning of March 9, the last day to file as a challenger to U.S. Senator Steve Daines, the first-term incumbent held a commanding lead in his bid for reelection. Daines, a former software executive and reliable Republican ally of President Trump, was considered a lock over the scattered field of little-known Democrats who’d declared their candidacies. But that was before the secretary of state’s office at the Capitol in Helena received a last-minute visitor: Governor Steve Bullock, a two-term Democrat and the state’s most popular politician, who arrived to submit his filing papers from his office across the hall. “We decided that this wasn’t a time to be on the sidelines,” Bullock said after filing.

Bullock’s entry upended the Senate race. Most of the half-dozen other Democratic contenders quickly withdrew, and suddenly the party seemed to have a chance. Daines has swayed undecided voters since July and narrowly retaken the slim advantage the governor held in early polls, but most survey results so far have remained firmly within the margin of error. The Bullock-Daines election seems likely to be among America’s most competitive on Nov. 3, and with Republicans nursing a fragile 53-47 majority in the Senate, Montana’s might just be the unlikely seat that flips the upper chamber into Democratic hands.