The improbable rise of Herman Cain could come to an end Saturday, with multiple sources saying that the candidate will announce his withdrawal from the race. Cain will make an announcement at the opening of his Georgia state headquarters today. He reportedly met with his wife Friday to discuss his campaign's future. Sources tell NBC's David Gregory and Politico that Cain's announcement will likely be that he's dropping out. Multiple allegations of sexual harassment and a new accusation of a 13-year affair have taken a toll on the one-time frontrunner's support.