What's the main thing in Maine's Senate race?

Democrats see Maine as one of their best chances to flip a Republican senate seat in this autumn's midterm elections. We look at Democrats vying to replace Sen. Susan Collins, as well as Collins' chances at winning another term in office. This episode: senior White House correspondent Tamara Keith, senior national political correspondent Mara Liasson, and Maine Public correspondent Kevin Miller. This podcast was produced and edited by Casey Morell & Bria Suggs. Our executive producer is Muthoni Muturi.