puerto rico drowning in catastrophic harvey-like flooding from hurricane maria. we'll show you some of the first images from this battle island -- battered island. let's get right to the latest on the senate's healthcare hail mary. phil mattingly has that for us. >> as the senate plows toward a vote to repeal obamacare, president trump is unequivocal tweeting, i would not sign graham/cassidy. it did not include coverage of pre-existing conditions. it does. >> more people would have coverage and we protect those with pre-existing conditions. >> reporter: trump's defensiveness over the issue is understandable. the issue of whether the gop proposal maintains protections for all has been a central and toxic piece of the repeal debate for months. and one that has been magnified exponentially by, of all people, a late-night talk show host on a two-night attack.