I don’t think there’s any educational value to what he’s doing because he’s one person, just a single data point. We can’t generalize from that, we do experiments in a controlled way on many more people.

Election Day is traditionally the day to vote, campaigns are still running before that point. Anyone who votes earlier does so with less information than later voters. Trump could say something stupid between now and Election Day, and wouldn’t you feel bad if you’d already voted for him and couldn’t take it back?

Same reason morning is earlier in the day than night. This is just how linear time works.