U.S. Blockade of Iranian Ports Begins Today

President Donald J. Trump has formally notified Congress of the resumption of U.S. military operations against Iran and the United States begins enforcing a naval blockade of Iranian ports this afternoon at 4:00 p.m. ET, the latest development in a conflict that resumed last week following a breakdown in the ceasefire with Iran.

The move follows a third consecutive night of U.S. airstrikes on Iranian targets, ordered after Tehran attacked neutral-flagged commercial vessels in the Strait of Hormuz on July 6 and 7 — an action the White House says violated a ceasefire agreement signed weeks earlier. President Trump notified Congress under the War Powers Resolution, opening a new 60-day window for continued operations without additional congressional approval.

The administration has described the blockade as a security measure aimed at protecting commercial shipping and regional allies, with Trump proposing the U.S. serve as “GUARDIAN OF THE HORMUZ STRAIT,” including a 20 percent fee on cargo transiting the waterway in exchange for U.S. protection. The proposal marks a shift from earlier statements by Secretary of State Marco Rubio, who had called toll proposals for the strait impractical.

Markets responded quickly: oil prices rose more than 9 percent on the news, the largest single-day increase in over six years, as traders weighed the risk of a longer conflict. Iran says it struck and disabled two tankers in the strait, while regional allies including the UAE and Jordan report intercepting Iranian missile fire in recent days.

In Congress, both chambers passed resolutions last month seeking to limit the president’s authority to continue military action without explicit authorization. Those measures carry limited legal force and would likely face a veto if brought to the president’s desk. With strikes ongoing and oil prices rising ahead of the midterms, the situation remains fluid on both the military and political fronts.

The president is scheduled to address the nation on Thursday at 9:00 p.m. ET.