Joe Walsh's Mission is to Stop Trump

On the day he dropped his campaign to be the Republican presidential nominee, Virginia Heffernan talks to former Illinois congressman Joe Walsh about facing Trumpites, the pressure to please conservative advertisers, when the Tea Party became populist, his now-infamous "grabbing my musket" tweet, and his pledge to support the 2020 Democratic nominee for president. Learn more about your ad choices. Visit megaphone.fm/adchoices