Elon Musk and Sen. Mark Kelly sparred on social media Monday, with the tech billionaire calling the Arizona Democrat a "traitor" over a series of posts in support of Ukraine and its people. Meanwhile, The Bulwark's Bill Kristol says Republicans must denounce Musk's treason charge. For more context and news coverage of the most important stories of our day click here: https://www.msnbc.com/ » Subscribe to MSNBC: https://www.youtube.com/msnbc » Subscribe to MSNBC on TikTok https://www.tiktok.com/@