Iran is enforcing a closure of the Strait of Hormuz and threatening to maintain it until the U.S. lifts its naval blockade on Iranian ports, as a ceasefire between the U.S.-Israel coalition and Iran is set to expire Wednesday. The dueling blockades are complicating mediation efforts, with negotiators from Pakistan and other mediators working to extend the truce, though significant gaps remain in talks. Trump convened a White House Situation Room meeting on Saturday morning to address the strait crisis and negotiate with Iran, signaling the administration views this as an immediate threat to global shipping and energy markets.