I'm not overly convinced that Harris will win. That being said, I firmly believe that had Biden run again, he would have lost so badly that it would have been 2036 at the earliest before another Democrat was elected as president. Unless the polls are even more spectacularly wrong than they were in the last two elections, if Trump does win then the Democrats should be in a decent position to retake the White House in four years time once he hits the term limit.