President Trump said on Friday that he's convening his national security team in the White House Situation Room to make a final decision about the agreement reached between U.S. and Iranian negotiators. Why it matters: The signing of the memorandum of understanding (MOU) would be the most significant diplomatic breakthrough since the war started, but a final agreement tackling Trump 's nuclear demands would require further negotiations. The text of the MOU — which involves a 60-day ceasefire extension and the reopening of the Strait of Hormuz — was largely agreed as of Tuesday, but Trump told the mediators he needed more time to make a decision. What he's saying: In a Truth Social post on Friday morning, Trump laid out the main elements in the deal that he wants to emphasize and seemingly suggested he was about to accept it.…