Actually, I think after this election, no matter the outcome, it will be the Republican Party which will suffer the most. The party as a whole has become more and more liberal. It has made clear that true conservatives are no longer welcome. There are plenty of disgruntled voters out there, so I see Republicans losing majorities in both houses of Congress. When that happens, even if Trump wants to advance his agenda, such as nominating conservative justices to SCOTUS, he won't get the approval of Congress (not that I expect Trump to really keep any of his promises). This will destroy the party as we know it. In order to survive, the party will have to become even more liberal, and I can't see the US sustaining 2 liberal parties. One will have to go, and that one will be the Republican Party.