GOP’s Nikki Haley takes on Trump

MSNBC’s Ari Melber hosts “The Beat” on Tuesday, February 14, and reports on Mike Pence’s plans to fight the special counsel subpoena on the 2020 election, and Donald Trump’s first 2024 GOP challenger. Plus, Melber talks nuclear fusion and UFO’s with astrophysicist Neil Degrasse Tyson. Andrew Weissman, David Kelley, and Juanita Tolliver also join.