Guests: Sarah Longwell, Jess McIntosh, Rep. Colin Allred, Tommy Vietor

Donald Trump takes the money and runs. Tonight: how Trump has effectively destroyed his own political party, up and down the ticket. Then, the latest on a possible U.S. military response as the Republican frontrunner avoids the issue. And the podcaster from Texas under pressure, one of the Democrats seeking to topple Ted Cruz joins live.