MSNBC has a new addition to its staff — Sen. John McCain’s daughter, Meghan McCain. On his Wednesday program, MSNBC host Thomas Roberts introduced McCain and asked her to address her back-and-forth with presidential candidate and former Speaker of the House Newt Gingrich. “Can you believe that?” McCain asked. “Former Speaker of the House I’m getting in fights with, I can’t believe it.” In a specific incident addressing some remarks McCain made about his presidential bid, Gingrich said, “How would she have a clue?” “I think he’s delusional,” McCain said. “And him calling me clueless I think is so sexist...