Washington — The Senate on Wednesday voted to repeal the legal justifications used to attack Iraq in 1991 and 2003, endorsing a rare bipartisan effort by Congress to revoke the authority to wage war from the executive branch just days after the 20-year anniversary of the start of the Iraq War.

In a vote of 66 to 30, the Senate approved a resolution to repeal the 2002 authorization for the use of military force, or AUMF, that Congress adopted ahead of the March 2003 invasion by U.S. and allied troops, as well as the 1991 authorization for the first Gulf War.

Proponents of repealing the authorizations say doing so is necessary to prevent future presidents from abusing their power, while not hamstringing current counterterrorism efforts.

"The United States, Iraq, the entire world has changed dramatically since 2002, and it's time the laws on the books catch up with those changes. These AUMFs have outlived their use. These repeals will not harm our service members abroad, nor will it hinder our ability to keep Americans safe," Majority Leader Chuck Schumer said on the Senate floor ahead of the vote. "Every year we keep these AUMFs on the books is another chance for a future administration to abuse them. War powers belong in the hands of Congress."

The legislation now heads to the House, where lawmakers on both sides of the aisle are open to taking action. In 2021, when Democrats controlled the House, the lower chamber voted to repeal the 2002 authorization, but it never received a vote in the Senate. Forty-nine Republicans joined nearly all Democrats in voting for repeal at the time.

"A broad and diverse coalition in the House supports this legislation, and I am hopeful the bill will receive prompt consideration," Republican Sen. Todd Young, who introduced the bill with Democratic Sen. Tim Kaine, said in a statement after the vote.

House Speaker Kevin McCarthy told reporters at a Republican retreat in Florida earlier this month that the measure repealing the war authorizations would likely make it to the floor for a vote. 

"It'll have to go through committee," McCarthy said. "I think it has a good chance of one getting through the committee and getting to the floor." 

White House press secretary Karine Jean-Pierre said President Biden supports repealing the 1991 and 2002 authorizations and is open to replacing "outdated authorizations" with a "narrow and specific framework that will ensure we can continue to protect Americans from terrorist threats."

"We've long supported the repeal and applaud the Senate for taking action," she told reporters Wednesday. "We urge the House to move quickly as well." 

The Senate rejected a number of amendments before voting for final passage, including Republican Sen. Rand Paul's amendment to repeal a separate 2001 AUMF targeting those responsible for the Sept. 11 attacks, which still forms the legal basis for many U.S. counterterrorism efforts. An amendment from Republican Sen. Lindsey Graham to authorize force against Iranian-backed militias operating in Iraq also failed. 

The ability to target Iran's proxies in Iraq was a driving issue for Republicans who opposed repealing the authorizations, concerns that were underscored by attacks on U.S. bases in Syria last week in which several U.S. service members were wounded and an American contractor was killed. Mr. Biden ordered strikes against facilities in eastern Syria used by groups affiliated with Iran's Revolutionary Guard in response. 

"While I understand theoretically why we want to get rid of the 2002 AUMF because Saddam [Hussein] is gone, I don't understand why we're leaving this vacuum and this doubt," Graham said Monday on the Senate floor, referring to the late Iraqi dictator. "This is easily fixed. You're creating a narrative that's going to come back to haunt us. You think it's an accident within like two days of introducing this idea that they hit us in Syria again?" 

Supporters of a repeal said Mr. Biden didn't need congressional authority to retaliate against Iranian-backed groups.

"The president looked at the intelligence, he consulted his advisers, he ordered a strike," Democratic Sen. Bob Menendez said Monday. "And he committed publicly to continue to defend against Iranian aggression and to respond to attacks against U.S. forces. He did so without — without — relying on the 1991 or 2002 authorizations for use of military force against Iraq." 

The Senate also rejected an amendment from Republican Sen. Marco Rubio that would have halted the 2002 repeal until the Biden administration certified that Iran has stopped supporting terrorist organizations and violent groups in Iraq and Syria. 

During a Senate hearing on the Defense Department's budget on Tuesday, Republican Sen. Tom Cotton questioned whether the administration's delay in informing Congress about last week's Syria attack was connected to the Rubio amendment. 

"Do you believe you should've notified us that morning while we were voting on amendments directly related to this kind of attack?" Cotton asked Defense Secretary Lloyd Austin. 

Austin denied there was a connection between the amendment vote and notification to Congress, but Cotton was unconvinced.

"I believe there was a conscious decision made not to inform Congress because you fear it might lead to passage of the Rubio amendment, which would kill the entire bill," Cotton said. 

President Barack Obama formally ended the Iraq War in 2011 and ordered the withdrawal of U.S. troops, marking "a new phase in the relationship between the United States and Iraq." Three years later, U.S. troops returned to fight the terrorist group ISIS, and the Obama administration cited the 2002 authorization as the legal justification for military operations against the militants. 

Mr. Biden has generally cited the 2002 authorization several times when informing Congress of military action, but hasn't specifically invoked it for any single incident, based on a review of White House notifications to Congress.

In 2020, then-President Donald Trump used the 2002 authorization as part of the legal justification for an airstrike that killed Iranian military leader Qassem Soleimani in Baghdad. Congress responded by passing a resolution prohibiting military force against Iran, but Trump vetoed it.

Caitlin Yilek

Caitlin Yilek is a politics reporter for CBS News Digital. Reach her at [email protected]. Follow her on Twitter: https://twitter.com/hausofcait

Twitter