Robert Costa, national political reporter for The Washington Post, talks with Rachel Maddow about how New Jersey governor Chris Christie made enemies of his fellow Republicans during the Romney campaign and now works from a deficit for 2016.
Progressive leader Sen. Elizabeth Warren said it's "too early" to say if she'll campaign for Bernie Sanders. Will she endorse him or Hillary Clinton? When will she pick her candidate? David Axelrod, David Corn, Kasie Hunt, and Thom Hartmann join the show.