If Trump dropped out right now it would be kind of weird, because he's been nominated and has accepted.
But, yeah. If he were to drop out now, they would have to go with another candidate. I assume, at that point it would have to be his running mate, because no mechanism exists for choosing another. It would be chaotic, but the party would still field a candidate.
If Joe had fallen ill or been shot, would you expect him to carry on with the campaign?The Democrats would go to their convention and nominate a candidate. That's what they're going to do. Throughout most of our history, that's how it was done. In this case, yes, Joe won the primary process, but he lost the electorate's confidence, and it wasn't even close, and he bowed out. That's not unheard of either.
The tradition of picking a nominee through primaries and caucuses – and not through what is called the “convention system” – is relatively recent. In 1968, after President Lyndon B. Johnson announced he would not run for reelection, his vice president, Hubert Humphrey, was able to secure the Democratic nomination despite not entering any primaries or caucuses.
I have a couple more questions. Why was 2012 normal, but not 2016?
And finally, what is your main problem here? Were you a die hard Joe Biden fan, and now you're disappointed that he won't be president? Do you have an entire storage locker or two full of "Let's go Brandon" merchandise, that you mortgaged your mobile home to buy, and that you won't be able to unload at the rallies now? Let me go with the more likely answer... the more obvious, if you will. You saw Joe looking pretty frail, and you figured the election was going to be a cakewalk for donald... a gimme as it were, and now you're pissed as all get out, because your guy is a demented elderly felon, and you don't think he can get it done against a viable opponent.