One or both. The damage would differ only in the size of Obama's victory. It's folly to think democrats are going to come over to vote for Paul or Trump in any appreciable numbers.
I haven’t seen one democrat who says they are pissed off with Obama who said they would consider voting for a republican, no matter how progressive the republican.
These people are so brain washed by Democratic politics they can’t even consider the proposition that progressive republicans are pushing.