Trump is at his best point to save face right now. It's now or never, IMO. He killed an entire leadership lineup of Iran. If he pulls out now it is a clear victory for him. If he continues the campaign 2 or 3 more weeks it's tough for me to find another out for him that doesn't involve a lot more risk to the USA.

Given he did take this clear victory and cash in, in Venezuela, there is some hope he'll do the same in Iran.