thousands will gather here in two days to observe the 78th anniversary of the attack on pearl harbor. norah. o donnell: jonathan in honolulu, thank you. now to a cbs news exclusive. cbs this morning s gayle king sat down in colorado with mike bloomberg for his first tv interview since joining the race for the democratic nomination for president. reporter: do you think president trump should be impeached? i think it s a very serious thing, but it and i was before opposed to it, but after looking at all the evidence, i think, yes. sad, but yes. reporter: what is the biggest thing that troubles you about him? he does not seem to understand that he is the an elected official whose job it is to work for the public rather than for himself. o donnell: moaira as things t pretty hot in iowa. democratic frontrunner joe biden went at it with a voter who