Senate Blocks Bid to Limit Iran War Powers

Mark Stebnicki, Pexels

The U.S. Senate narrowly rejected an Iran war powers resolution on Tuesday. The vote fell short by a single tally, ending 48-47, and the measure did not advance.

The decision came as President Donald Trump promoted a new U.S.-Iran agreement in 2026. He told reporters he was willing to send the deal to Congress for review. “I like the idea,” he said.

The result kept the spotlight on a fight between the White House and Capitol Hill. Lawmakers from both parties want more details about the pact, and many say they have not seen the text.

What the Resolution Would Have Done

Sen. Raphael Warnock of Georgia introduced the resolution. It would have directed the president to remove U.S. forces from hostilities in or against Iran unless Congress explicitly approved the action.

Warnock urged Republicans to back the measure. He argued that Congress should not sit back and let the president make every call on foreign wars.

The Senate vote on the Iran deal showed some cracks in Republican support. Four Republicans crossed the aisle to side with Democrats: Sens. Susan Collins of Maine, Bill Cassidy of Louisiana, Lisa Murkowski of Alaska, and Rand Paul of Kentucky.

One Democrat broke the other way. Sen. John Fetterman of Pennsylvania was the only member of his party to oppose the resolution, voting with the Republican majority. The U.S. Constitution gives Congress, not the president, the power to declare war. Warnock pointed to that fact as he made his case on the Senate floor.

A Secret Deal Stirs Frustration

Trump announced the U.S.-Iran agreement on Sunday. He called the deal complete and framed it as a path to ending months of fighting that has killed thousands and shaken the global economy.

According to officials from both countries, the agreement would extend a fragile ceasefire by another 60 days. It would also reopen the Strait of Hormuz, a major shipping route that had been blocked since late February.

Yet the text of the pact has not been released. As lawmakers remained in the dark, frustration grew on both sides of the aisle.

Trump said he had not thought about sending the memorandum of understanding to Congress, but that he would do it. He added that he wanted to wait until after a formal signing ceremony expected on Friday.

He also insisted that Iran would give up its nuclear weapons program. Iran has long said its nuclear program is for peaceful purposes.

The 2015 Law in Play

The Iran Nuclear Agreement Review Act of 2015 could force the president’s hand. Under that law, any agreement related to Iran’s nuclear program must be submitted to Congress for review before sanctions can be eased.

That review leaves open the chance that lawmakers could try to block parts of the deal. The law was passed while President Barack Obama’s administration finalized an earlier Iran nuclear agreement.

Senate Majority Leader John Thune of South Dakota pressed the administration for answers. He told reporters he had requested the text of the memorandum along with a briefing.

Thune acknowledged it was unusual for an administration to withhold such information from its own party. “Since I’ve been in this job, we haven’t had this issue,” he said.

Other Republicans voiced similar concerns. Sen. Thom Tillis of North Carolina questioned how he could take a secret deal seriously.

Democrats Push for Briefings

Senate Minority Leader Chuck Schumer of New York led the Democratic response. He said Trump had claimed to reach an understanding with Iran but still had not shared the details.

Schumer called on the administration to brief Congress’ “Gang of Eight.” That group includes intelligence committee and congressional leaders who are typically briefed on major national security events.

He also said officials should brief the entire Congress and inform the American people. No plans for such events have been released.

The push for a Trump Iran deal review in Congress is far from over. Schumer said Democrats are still working on a separate resolution sponsored by Sen. Tim Kaine of Virginia.

Schumer said the goal is to line up more Republican support before bringing the Kaine measure forward. “It’s up to Republicans,” he said.

The House and the Legal Fight

The House has already acted on the issue. Earlier this month, it passed its own resolution to force an end to military action in Iran without congressional approval.

That measure marked the first successful attempt in the lower chamber to rein in the president on Iran. The Senate, however, has not taken it up.

The administration has pushed back on the legal questions. As the Senate shot down the resolution, officials argued that key parts of the War Powers Resolution are unconstitutional.

They also said a 60-day deadline for ending the use of force was paused by the April ceasefire. A group of Democratic senators, led by Sen. Adam Schiff of California, disputed that view in a letter to the president.

The next Iran war powers resolution could surface soon. For now, the U.S.-Iran agreement remains secret, and Congress is still waiting for answers.

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