You expect an objective answer to that?
From Dreams of my Father:
Their anger won't be checked by the intimation of danger that would come upon me whenever I split another boy's lip or raced down a highway with gin clouding my head.
Would "splitting a lip" be bullying? Anybody remember the mass media indignation about Bush's old DUI?
Did leaving a woman to drown in a car hurt Kennedy's career? Did rape accusations hurt Clinton's?
Your behavior is important if you're a Republican. Not if you're a Democrat. That is the only criteria applied.
On the other hand, now that I think about it, I'm wondering now how much of Obama's biography is imaginary.