The question was COULD HE, and the answer is YES, but of course as you said that is depending on the deal. My concern is that he has already now said that he is going to sign whatever Congress sends him, and that is not what we elected him for, so it appears he may be off course at the moment.
Who controls Congress the Republicans do. They already went through the scenarios at Camp David. And if there is no deal? Well that still satisfies many here. The DUmb Dems likely even get the blame for not getting DACA through from their supporters.