Bloomberg: I Could ‘Defeat Donald Trump,’ but Dem Primaries Tougher to Win

TAPPER: "Kaitlan, take a listen to this excerpt from his piece, explaining his decision. 'I believe I would defeat Donald Trump in a general election. But I am clear-eyed about the difficulty of winning the Democratic nomination in such a crowded field.' And that's  really, I mean, that's the oldest story in the book."