Viewer's Guide: Latest bombshell on Trump hangs over debate

The latest bombshell about Donald Trump dropped just in time to rock Sunday's presidential debate.For many people, the jaw-dropping 2005 video of Trump's vulgar comments about women trumps anything else that has come out about the Republican nominee. And it gives Hillary Clinton fresh ammunition for her second faceoff with the GOP nominee.Some things to watch for in the 90-minute debate at Washington University in St. Louis:A MERE 'DISTRACTION'?With his campaign in crisis, Trump issued a short v