Need a better treaty
Trump will try to get it done before they run him out of town
No he won't. Iran has no interest in a new treaty and right now the international coalition that backed sanctions was dead before, and we just killed it deader. Trump has no ability as a negotiator beyond bullying, and no interest in the work required for rebuilding the coalition Obama and Clinton put together to restore effective international sanctions.
Besides, if I am Iran, I look to the NK model. Trump is a blowhard who threatens and rages but doesn't follow through. Once you get a bomb, he is your bitch.