By mid-January, the president will face new legal deadlines to choose whether to slap U.S. sanctions back on Tehran. Senior lawmakers and some of Trump’s top national security officials are trying to preserve the agreement. But the deal’s backers fear Trump has grown more willing to reject the counsel of his foreign policy team, as he did with his recent decision to recognize Jerusalem as Israel’s capital.

The decision represents an opportunity for Trump to deliver on a campaign promise to rip up the Iran deal, one he has repeatedly deferred at the urging of senior officials.

When Trump last publicly addressed the status of the Iran agreement, in mid-October, he indicated his patience had worn thin with what he has called “the worst deal ever,” and demanded that Congress and European countries take action to address what he considers the deal’s weakness.