Sen. Jon Tester is an experienced political strategist and capable campaigner whose reputation as a working farmer has helped him to defy the odds as a Democratic in ruby-red Montana. But can he win re-election in a year that one of opponents, Republican Tim Sheehy, could benefit from Donald...

Texas's 15th Congressional District is held by Rep. Monica De La Cruz, a Republican. Her Democratic challenger is Michelle Vallejo. Organizers from both parties believe they've got the right message to win the district's Tejano voters. This episode: senior White House correspondent Tamara Keith,...