Former Trump advisor Mick Mulvaney, during a conversation on NewsNation, speaks on the ouster of Mike Waltz as White House national security adviser. The ousting of national security adviser Mike Waltz triggered a major shake-up in President Trump’s White House team, which is divided between America First-isolationists and traditional Republican hawks. Waltz has been targeted by MAGA loyalists inside and outside the administration over an alleged lack of commitment to the president’s agenda, and