Steve Benen, Emmy award-winning producer for The Rachel Maddow Show, joins Press the Button to discuss his new book, The Impostors: How Republicans Quit Governing and Seized American Politics, in which he argues that the GOP has become a "post-policy" party. Early Warning features Matt Korda of Federation of American Scientists and Luke Schleusener of Out in National Security on the landmark Supreme Court decision regarding discrimination on the basis of sexual orientation and gender identity in the workplace, and an emerging congressional fight over the resumption of nuclear testing.