In an unusual act of resistance against the routinely passed National Defense Authorization Act (NDAA), every Democratic member of the U.S. Senate united on Tuesday to block the annual must-pass defense budget legislation, drawing a line in the sand over the Trump administration’s controversial policies toward Iran and Israel. The 50-46 vote fell far short of the 60 votes required to advance the bill, leaving the $1.162 trillion defense package stalled on Capitol Hill, with parallel negotiations also deadlocked in the House of Representatives.
The proposed bill allocates $1.1 trillion in core funding for the Pentagon, $41 billion for the U.S. Department of Energy’s nuclear weapons stewardship program, and an additional $11 billion for miscellaneous defense-related priorities. While the NDAA has a decades-long history of bipartisan passage, this year’s iteration has ignited fierce intraparty and interbranch debate over its new provisions deepening U.S.-Israeli military ties, as well as anger over the Trump administration’s unauthorized military escalation against Iran.
In the House, where Republicans hold only a razor-thin governing majority, the bill has also failed to move past opposition from cross-party critics. A bipartisan amendment spearheaded by Democratic Representative Ro Khanna and Republican Representative Thomas Massie, designed to remove the most contested new provision of the bill—Section 219, which creates the U.S.-Israel Defense Technology Cooperation Initiative—did not pass. However, it drew more than 100 votes from House Democrats, a sign of deep unrest within the Democratic caucus over the legislation’s approach to the Middle East. The intra-party split was on full display from California Democratic Representative Brad Sherman, who took to social platform X to condemn the amendment, arguing it “sends a clear signal to the enemies of America that we are willing to abandon our allies and our own security,” labeling the measure “anti-Israel, pro-terror.”
In the Senate, progressive Democrats led the opposition, centering their criticism on the unchecked expansion of military collaboration with Israel and claims that Israeli influence pushed the Trump administration to launch its February 28 war against Iran—a move that many lawmakers argue violates federal law requiring congressional authorization for major military conflict. “Not only does this effectively green light Trump’s illegal Iran war, it also gives the Israeli government immense leverage over our national security,” Maryland Democratic Senator Chris Van Hollen posted on X ahead of Tuesday’s vote. Following the vote, Vermont independent Senator (and caucus-aligned Democrat) Bernie Sanders echoed that frustration, noting: “At a time when millions struggle to pay the bills, virtually every Senate Republican voted… for the illegal and immoral war in Iran and a special provision to provide even more weapons to Israel with almost zero oversight. It’s time to invest in the American people, not endless war.”
Even Senate Minority Leader Chuck Schumer, a New York Democrat who has long supported close U.S.-Israel ties and has taken a less hardline stance against the Iran conflict than progressive colleagues, backed the unified opposition. Schumer stated publicly that Trump “is dragging America deeper into a war in Iran with no authorization, no plan, and no exit strategy. Democrats will not go along.”
Section 219, the provision at the heart of the debate, is a novel addition to this year’s NDAA that would formalize expanded, deeply integrated military technology cooperation between the U.S. and Israel across all defense sectors, from missile defense systems to artificial intelligence and next-generation emerging military technologies. Once implemented, the framework is structured to be largely irreversible, making its adoption a permanent shift in the bilateral military relationship. That permanence, combined with shifting voter attitudes, has turned the provision into a flashpoint: consecutive public opinion polls show Democratic voters have grown increasingly critical of Israel’s actions in the region, putting pressure on party lawmakers to push back on expanded military ties.
The Senate’s move to block the bill has been widely celebrated by progressive advocacy groups focused on Middle East policy. The American Arab Anti-Discrimination Committee issued a statement praising the “every senator who voted no [and] who demanded scrutiny of provisions that would permanently intertwine the U.S. and Israeli military and intelligence apparatuses,” adding that the original bill would have “severely compromised America’s independence and its ability to pressure Israel to stop its military expansions and genocides of the Palestinian and Lebanese people.” The National Iranian American Council also applauded the blockade, stating: “We applaud those Senators who acted and demonstrated that Congress will not stand by while the President openly defies the law. Blocking the NDAA sends an unmistakable message: if the President refuses to obey the law, Congress can and must bring the Washington war machine’s business to a halt.”
Despite the current stalemate, congressional leadership still projects that a revised version of the NDAA will pass before lawmakers depart for their annual August recess, with compromises likely on the controversial provisions to win enough bipartisan support for advancement.