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.