Because he has to be effective for four more years after the vote.
Fuck its like you people think everything just closes up for the next four years and elections are just a one-day championship ceremony
After the ceremony, you plant the turnip in a flower pot and have the administration run things. There’s hundreds of other people, from ministers (or secretaries, over there) to all kinds of aides and attachés and whatnot. Just one guy missing wouldn’t really make much difference.