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US Sen. Tammy Duckworth

US Sen. Tammy Duckworth (D-Ill) speaks during a press conference on the Iran war and its impact on gas prices outside the US Capitol on May 20, 2026 in Washington, DC.

(Photo by Kevin Dietsch/Getty Images)

'End This Illegal War': Senate Dems Set to Block Trump Military Budget Over Renewed Iran Assault

"Simply throwing more money at an out-of-control military operation is not strategy," said Sen. Tammy Duckworth.

Senate Democrats appeared set to block President Donald Trump and the Republican Party's sprawling, $1.15 trillion annual military policy bill in a procedural vote scheduled for Tuesday after the White House formally notified lawmakers of an extension of its illegal Iran war.

Sen. Tammy Duckworth (D-Ill.), a member of the Senate Armed Services Committee, said she would oppose advancing the 2027 National Defense Authorization Act (NDAA) unless lawmakers agree to attach her amendment prohibiting any of the bill's funds from going toward the war on Iran. Duckworth said in a statement that "simply throwing more money at an out-of-control military operation is not strategy. It’s a recipe for a forever war."

“The Senate cannot authorize $1.14 trillion in defense spending—the largest defense budget ever proposed in our nation’s history—for Donald Trump to continue his illegal and disastrous war that Americans do not want," Duckworth added. "The stakes couldn’t be higher, and I cannot support a defense authorization bill that doesn’t include my amendment to end this illegal war."

The procedural vote on the NDAA is scheduled for 2:40 pm ET, and it needs 60 votes to advance—requiring the support of some Senate Democrats.

Sen. Tim Kaine (D-Va.), who spearheaded earlier efforts to halt Trump's Iran war using the War Powers Act, told reporters on Monday that "it’ll probably be hard to get there this week," referring to the 60-vote threshold needed to advance the NDAA. Sen. Jeanne Shaheen (D-NH), who is seen as a critical swing vote, said Monday that she's "undecided" on the legislation.

Sen. Chris Murphy (D-Conn.) said he would vote no, calling the NDAA "essentially an Iran war authorization bill."

"A totally unprecedented 50% increase in spending to fund the war without any meaningful restraints," Murphy wrote on social media.

Just Foreign Policy, an anti-war advocacy organization, said Monday that no senator who has supported legislative efforts to end the Iran war should back additional funding for the military as long as the illegal conflict continues.

"The ceasefire has collapsed, US bombs are falling on Iran again, and oil prices are climbing... all after Americans were told this war was over," the group wrote in a new petition urging lawmakers to "defend the Constitution, stop the Iran war, and vote NO on the NDAA."

"Congress has additional leverage to force compliance: the power of the purse," the petition continued. "If members block the NDAA... and reject any Iran war supplemental—Trump cannot ignore them."

In addition to the $1.15 trillion NDAA, the Trump administration is pushing for at least $67 billion in supplemental Pentagon funding to "address urgent needs related to" the Iran war, which is now in its fourth month despite the president's insistence in late March that it would be over "within two to three weeks."

Late last week, Trump formally notified Congress of new "strikes against targets within Iran," insisting the attacks were "consistent with" the War Powers Act.

Critics accused the president, who has never sought congressional authorization for the war, of cynically trying to restart the 1973 law's 60-day clock after declaring the ceasefire with Iran "over." The War Powers Act requires "automatic termination of the use of US forces engaged in hostilities 60 days after the president has reported (or was required to report) on the use of force."

"Any assertion by the Trump administration that he gets 60 more days to act without Congress has no foundation in law," said Sen. Adam Schiff (D-Calif.), who on Monday unveiled a new war powers resolution aimed at ending the president's assault on Iran.

"By forcing a new vote to end this war, we make it clear that Congress insists on the removal of troops from the region barring an authorization of force accompanied by a truly viable strategy—both of which have been lacking," Schiff added.

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