Based on the way we've circumvented the constitution for the last 30 years...I doubt this revelation would be an easy out. I wouldn't hold my breath. If it were true, I'll bet there would be some unconstitutional house resolution allowing it in this case.
If it were proven that he was indeed born in Kenya and he won the election I think there would be a hellish uprising that would split the country if he were declared POTUS !
Maybe he just went to Hawaii to snuff the old woman to keep her quiet ?