I have him staying in. If he agrees not to run because of frailty, then there will pressure to step ddown immediately, sharing resignation only with Nixon. Even if he resists that, he would be the lamest of lame ducks. No personal upside to leaving now, just a different and worse hell for the Bidens.
His campaign already issued a statement saying that Biden is NOT going anywhere he’s in it to win it
If he only drops his candidacy but stays on in office, I’m afraid he’ll go scored earth. He’s a nasty, vindictive creep, he’s liable to do something to really hurt the country.