the other factor is voter commitment. in 2016 democratic voters expected an easy hillary win so it wasn’t as big a deal for individual voters get around to voting, some years things don’t work out scheduling wise for some voters and they don’t get around to voting. this year they will have a higher determination to get their vote in, and fewer voters will miss getting around to it. so i expect a higher turnout.
Perhaps, but there was a lot more voter enthusiasm on the Dems side to vote for the first woman President, compared to an old white guy who speaks in word salads...