"America is way more divided now than when he was first elected." GBA! - You're kidding, right?  America was always divided.  Obama's election and the rabid reaction to it by the Republican leadership just encouraged racists who'd been closeted by law and shame to "come out" again.  Black Privilege?  What a stupid thing to say.
Music?  Can't say I like rap.  Encouraging violence and sexism isn't the best use of the arts in my opinion.  But the incredible flap created by white people over Elvis Presley shaking his hips on national TV doesn't speak well of mainstream reactions to the daring and different.
No matter what intentions Obama had as a human and a politician when taking office the obstructionist freak show of the Republican Party made it publicly clear they wouldn't work with him.  His politics had nothing to do with it.  The GOP and it's corporate owners live in deadly fear of the day when Americans finally wake back up and recognize our real "enemy within".