My assumption is that, by now, Trump just wants to save face and move on to an easier target, one that can't strike back. He's been preparing the US opinion for Cuba.

So I wouldn't be surprised if negotiations just... stopped, without anything happening. Pretty much what happened, if I understand correctly, to the economic negotiations with Japan, EU, Canada, Mexico and anybody else regarding US import taxes.

But there's no oil to gain in Cuba, no stock market interests, and no pushing from Israel. So, why would he do that?