Dr. Oz, Administrator of the Centers for Medicare & Medicaid Services, joins MSNBC’s Ari Melber for an extended conversation on the Trump administration’s plan to lower prescription drug prices, the future of Medicaid, and RFK Jr.’s claims about vaccines. (The Beat’s YouTube playlist: https://msnbc.com/ari Beat merch: www.msnbc.com/Beat5) For more context and news coverage of the…