First: Tonight in Milwaukee, JD Vance, Donald Trump's VP pick, will introduce himself to both the nation and the world. Vance is expected to focus heavily on his personal story, rising up from a poor family that struggled with addiction in rural Ohio to becoming a graduate of Yale law school, a marine, a venture capitalist, a best-selling author, and now a United States senator.  We also have new reporting about a very tense call between President Biden and a group of centrist House Democrats on Saturday during which Biden told one lawmaker to "cut that crap out" after the congressman told the president that voters are losing confidence in him.    Learn more about your ad choices. Visit podcastchoices.com/adchoices