Montana Gov. Steve Bullock is the latest candidate to join the crowded field of Democrats vying to unseat President Trump in 2020. Bullock waited until the Montana Legislature ended to announce his long-rumored candidacy. Now he'll find out if his statewide popularity will translate to a national stage. Bullock spoke with MTPR's Sally Mauk about his just-launched campaign and why he'd rather be president than a U.S. senator, and his positions on some key national issues.