Republicans Weigh Supreme Court Challenge as Democrats Push War Powers Fight Over Iran

Republican frustration on Capitol Hill is escalating as Democrats continue using the War Powers Resolution to pressure President Donald Trump’s administration over U.S. military operations involving Iran.

Now, some GOP lawmakers are signaling that the dispute may not end with another congressional vote. It could eventually land before the Supreme Court.

Several Republicans have recently raised the possibility that the Trump administration may challenge the constitutionality of the 1973 War Powers Resolution, arguing that the law improperly restricts the president’s authority as commander in chief.

“I don’t think the constitutionality of that has been tested,” Rep. Brian Mast (R-Fla.), chairman of the House Foreign Affairs Committee, said during discussions surrounding the Iran conflict.

“I think it will probably be tested,” Mast added.

The War Powers Resolution was enacted in 1973 after the Vietnam War, when Congress sought to place limits on a president’s ability to commit U.S. forces to military action without legislative approval.

Under the law, presidents must notify Congress when U.S. armed forces are introduced into hostilities, and military operations generally cannot continue beyond 60 days without congressional authorization.

But conservatives have long argued that the statute represents an unconstitutional intrusion into executive power, particularly when national security threats demand swift and decisive action.

That concern has not been limited to Republicans. Administrations from both parties have questioned the law’s constitutional foundation for decades while often complying with it in practice to preserve working relationships with Congress.

Rep. Michael McCaul (R-Texas) said the issue may eventually have to be settled by the nation’s highest court.

“They may challenge it right over there in the Supreme Court,” McCaul said.

“Every president since [Vietnam] has always at least verbally challenged the constitutionality of it. And I wouldn’t be surprised if this administration did that,” he added.

The growing Republican pushback comes as Democrats continue trying to curb President Trump’s authority over military action involving Iran.

Democrats have repeatedly advanced war powers measures aimed at limiting the administration’s ability to conduct operations without explicit congressional approval.

Earlier this month, Democrats gained notable momentum when the Senate voted to advance an Iran-related war powers resolution with support from four Republicans, reflecting broader concern among some lawmakers about executive military authority.

More votes are expected once lawmakers return from recess.

In the House, GOP leadership recently pulled back from a planned vote that appeared likely to pass after attendance problems among Republicans complicated the effort.

A White House official defended the administration’s position while acknowledging the long-standing constitutional fight surrounding the War Powers Resolution.

“Administrations from both parties have abided by the statute without conceding its constitutionality to ensure good relationships with Congress,” the official said.

“That does not mean that any such administration felt that it is bound by the [law],” the official added.

“Nor does it stop the president from ordering a different course when he deems necessary to protect national security.”

White House spokesperson Anna Kelly said the administration remained compliant with the statute while underscoring President Trump’s constitutional authority.

Kelly said Operation Epic Fury, the administration’s military campaign involving Iran, had “concluded” and that the administration was in “full compliance” with the War Powers Resolution.

That statement came even as U.S. strikes continued and a naval blockade involving Iranian ports remained ongoing.

Senior Trump administration officials have also made clear they view the law as constitutionally flawed.

Secretary of State Marco Rubio called the War Powers Resolution “unconstitutional, 100 percent.”

Vice President J.D. Vance was equally direct.

“Fundamentally a fake and unconstitutional law,” Vance said.

Defense Secretary Pete Hegseth has also argued that President Trump already has the constitutional authority necessary to resume military operations involving Iran without waiting for congressional approval.

Some Republicans are urging the administration not to wait for the courts.

Sen. Lindsey Graham (R-S.C.) argued that President Trump should simply disregard the statute if national security requires it, Punchbowl News reported.

Graham said Congress already has a constitutional remedy if lawmakers oppose a military operation: the power of the purse.

“I’ve got no problem with any member of Congress trying to defund a military operation they think is bad,” Graham said.

“I’ve got a ton of problems with 535 of us trying to be commander in chief every 60 days,” he added.

The fight now places a major constitutional question at the center of Washington’s Iran debate: whether Congress can use a post-Vietnam statute to limit the commander in chief during a fast-moving national security crisis.

For Republicans backing President Trump, the issue is not merely about Iran. It is about restoring the constitutional separation of powers, defending the executive branch’s ability to protect American interests, and preventing Congress from turning battlefield decisions into recurring political theater.