CBS Face the Nation moderator Margaret Brennan was taken aback by a Republican congressman stating he supports the “purging of people throughout the State Department.”In an interview on Sunday morning, Rep. Brian Mast (R-FL) — who chairs the House Foreign Affairs committee — said that he’s on board with a purge of State Department personnel.SNIPBrennan was visibly surprised by the remark.“I’m sorry, can I follow up on what you just said there?” Brennan said. “You want to authorize purging of State Department personnel? What does that mean exactly?“Well, if you want to take a look at the State Department, where...