live tonight from washington university in st. louis, missouri, where tomorrow night donald trump and hillary clinton will face off in their second debate. but let's get to the breaking news right now. a defiant donald trump popped out of trump tower today waving to cheering supporters while fellow republicans are reeling from his lewd and sexually aggressive remarks which surfaced a day earlier. there are growing calls for trump to step down. senator john mccain leads a growing list of lawmakers who are abandoning their nominee. trump's wife, melania, calls his words unacceptable and offensive. running mate mike pence says he too is offended, adding trump will have the chance to show what's in his heart when he goes before the nation in tomorrow night's debate right here on cnn at 9:00 p.m. eastern. sources say hillary clinton is holding her fire until the debate gets under way. and late last night, trump did issue a statement of regret. >> i have never said i'm a