I think there's actually a fair amount of discontent among the Republican Party about renominating Trump. Legal problems that further jeopardized their chance of winning the general election would give them cover to rally around an alternate candidate. His legal issues—rape, attempting to stay in power in spite of losing an election—also aren't that obscure. They won't sway his die-hard supporters, but they do still turn off some Republicans.
If Biden does have to drop out for some reason, it's by no means clear that Harris would be the nominee.
Fascinating and frightening
Thanks for the comment, Phil.
I think there's actually a fair amount of discontent among the Republican Party about renominating Trump. Legal problems that further jeopardized their chance of winning the general election would give them cover to rally around an alternate candidate. His legal issues—rape, attempting to stay in power in spite of losing an election—also aren't that obscure. They won't sway his die-hard supporters, but they do still turn off some Republicans.
If Biden does have to drop out for some reason, it's by no means clear that Harris would be the nominee.