Political guru James Carville joins “The Beat” amid new scrutiny on Trump’s potential $400m gift from Qatar, Elon Musk saying he plans to spend “a lot less” on politics, and Trump’s “revenge” campaign of probing and indicting rivals. (The Beat’s YouTube playlist: https://msnbc.com/ari Beat merch: www.msnbc.com/Beat5) For more context and news coverage of the most…