MSNBC’s Lawrence O’Donnell is joined by Harvard Constitutional Law Professor Laurence Tribe who sounds off on Donald Trump’s attempts to block international students from the university. 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/@msnbc…