@AnarchoNinaWrites I think Harris is likely instead, personally. Mostly for the reason you just said, plus they can argue the primary nonsense all holds because it's the normal succession. That way they can anoint instead of opening worm cans.
Makes it also annoying that he picked someone nobody liked, but again, same 5 Year Plan either way. If the intent is to be a half-hearted speed bump, she's at least equal to Joe assuming she can win.