LOL -- perfect example. Roy Moore wasn't punished in any way, shape, or form by the GOP. He made it all the way to the general election. It was the voters of Alabama who didn't buy that sack of shit.
By contrast, the Dems tossed Al Franken out on his ass, no voting required
Run any Republican with a pulse and no history of molesting girls, and they should be able to beat Sen. Doug Jones this time. Because... you know, it's Alabama.
Now: if it were Mitt Romney or whoever running against Biden in 2020, he'd be toast over this allegation and all the other cringey shit he's done. But since it's Trump, Biden has a fighting chance