The United States on Wednesday reportedly launched deadly airstrikes against Iran-backed militias on the border of Syria and Iraq just after the House of Representatives passed a War Powers Resolution aimed at preventing President Donald Trump from launching an unauthorized war with Iran.

"We know from experience that the administration is likely to shoot first and figure out its legal justification later."

—Ryan Costello, NIAC Action

Reports of U.S. airstrikes came after two Americans and one British soldier were killed Wednesday in a rocket attack on Camp Taji, an Iraqi base north of Baghdad that houses U.S. troops.

Gen. Kenneth McKenzie, commander of U.S. Central Command, blamed Iran-backed militias for the rocket attack on Camp Taji during a Senate Armed Services Committee hearing Thursday. No group has claimed responsibility.

Speaking to the Washington Post, an anonymous American official denied that the U.S. carried out any airstrikes in response to the rocket

Reports of US airstrikes targeting pro Iran Iraqi militias on Syria-Iraq border. This is a repeat of cycle of escalation we saw last December, and continuation of increasingly fragile situation for American troops in country: https://t.co/LE1RldV12t SCROLL TO CONTINUE WITH CONTENT Never Miss a Beat. Get our best delivered to your inbox.





— Joyce Karam (@Joyce_Karam) March 11, 2020

The latest escalation in tensions occurred on what would have been the 63rd birthday of Qassem Soleimani, the Iranian general the U.S. assassinated in January with a drone strike approved by President Donald Trump. The assassination sparked retaliatory strikes by Iran and nearly resulted in an all-out war.

With the goal of preventing further military conflict, the House on Wednesday passed a War Powers Resolution that would bar Trump from launching a war with Iran without congressional approval. Trump has threatened to veto the measure, which is now headed to his desk.

"Yet again, U.S. and Iranian-backed forces appear to be exchanging fire in Iraq, despite the American people's desires to avoid yet another war of choice in the Middle East," Ryan Costello, policy director for advocacy group NIAC Action, said in a statement. "We know from experience that the administration is likely to shoot first and figure out its legal justification later."

"The choice for President Trump is clear," said Costello. "If he truly wants to end America's endless wars rather than start new ones, he should sign the resolution and prove his intentions to a skeptical American public and Congress. A veto would only demonstrate his desire to keep an unconstitutional war with Iran on the table."