The next US presidential election will be held on November 3, 2020. I "predict" or "guess intelligently" that the next US president will be a Democrat as long as Clinton is not running for the presidency.
As in the last election, Trump won't be a favourite or popular candidate to most Republicans. However, Trump will persist in running for reelection on his own. Result? He won't be so lucky in his next attempt.
P.S. Ralph Nader won't be out of the woods like Ralph47, as shown in the following animation originally posted by Ralph47 himself.