The IRS recently decided that it's perfectly fine for churches and other houses of worship to endorse candidates, upending 70 years of established law. It's just one of the ways the Christian right and the Republican Party have successfully demolished the separation of church and state, which we used to think was a central pillar of the American political system. Paul discusses the carnage with Sarah Posner, author of Unholy: How White Christian Nationalists Powered the Trump Presidency, and the Devastating Legacy They Left Behind.