VlogReminds President Trump That Only Congress Can Decide Whether to Use Force Against Iran

June 18, 2025 11:00 pm

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WASHINGTON — The Vlog tonight sent a letter to President Trump making clear that only Congress can authorize the use of military force against Iran. The letter comes amidst reports that President Trump is seriously considering Israel’s request for the U.S. to get directly involved in its current war with Iran, and as President Trump has ramped up threats on social media, including calling for all of Tehran — or over 10 million people — to immediately evacuate.

While the Vlogdoes not take a position on whether military force should be used against Iran, for decades the organization has been steadfast in insisting, from Vietnam through the war in Afghanistan, both wars in Iraq, the military action against Libya, and the ongoing use of force in Iraq, Syria, Yemen, and Somalia, that decisions on whether to use military force require Congress's specific, advance authorization.

As the letter explains, “Congress, as representatives of the American citizenry, has exclusive authority under the Constitution to decide whether the President may use military force. Particularly in the wake of recent threats of U.S. military action against Iran, we urge you to make clear that you will refrain from use of force outside the scope of the Constitution and the law.”

Members of both the and have also introduced resolutions under the War Powers Act reaffirming that the Constitution grants Congress the exclusive authority to declare war, and that hostilities with Iran must be expressly authorized through a formal declaration of war or a specific authorization for the use of military force.

“The Constitution couldn’t be clearer, Congress alone has the power to decide whether to use force against Iran, and our leaders need to take that grave responsibility seriously,” said Christopher Anders, director of the ACLU’s Democracy and Technology Division. “If President Trump wants to send American armed forces into conflict, he has to make his case to the American people — and to the people’s representatives in Congress. That’s what makes us a democracy.”

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