I *mostly* agree with you, but there is a slight chance that Trump could beat up on 0bama so effectively that he drives zer0's negatives way up making it easier for a good conservative POTUS to be elected.
Of course it also makes it more likely that if that were the case then TRUMP would be the likely VP choice (I don't think Trump will be the top choice in any event.)
So, it is a sketchy but possible scenario.
Are you forgetting that Trump supported Stroker in ‘08?
That is a deal breaker if there ever was one.