Be careful what you wish for. If Trump doesn't finish his term, then Pence will take over, be an even worse president, and get re-elected by a large majority.
But meanwhile, there is a way Trump can win in 2020. That's if the Democrats nominate Hillary again. Make no mistake, she senses Trump's weakness, and she WILL run. And she still has a large and irrationally passionate mob of supporters who have made it their life's work to get her elected.
http://www.nj.com/politics/index.ssf...00_things.html