Eh, I don't think he gets the benefit of the doubt from enough swing voters for it to matter.
Republican voters will always vote Republican, we need to make peace with that.
I think swing voters in the last election who liked neither candidate (I am totally cribbing someone's thesis here so apologies for that but it was well-put) assumed Trump would be similar to Bill Clinton - personally scummy, but politically savvy centrist who would be able to get things done. He'll have four years of proving that he is only one of those things.