Where Things Stand on the Iran War Powers Resolutions
Next week, Congress is expected to vote on two bipartisan war powers measures aimed at preventing unauthorized U.S. military action against Iran. The House is teeing up H.Con.Res. 38, introduced by Reps. Ro Khanna (D-CA) and Thomas Massie (R-KY), while the Senate is teeing up, S.J.Res. 104, introduced by Senators Tim Kaine (D-VA) and Rand Paul (R-KY). Both measures reflect bipartisan concern about escalation with Iran and the constitutional requirement that decisions of war and peace be authorized by the legislative branch.
Both Rep. Khanna and Sen. Kaine have announced their intent to call the resolutions up for floor votes next week, ensuring Members of Congress will be required to go on the record. Notably, Democratic leadership in both chambers has endorsed holding these votes. With the House version’s cosponsors standing at 83 and the Senate version’s cosponsors standing at 9, the cosponsorship levels on both resolutions show meaningful interest so far, though neither measure currently approaches the supermajority support that would guarantee passage.
Why Are These Votes Significant?
These votes will force Members of Congress to publicly affirm or reject the proposition that war with Iran requires congressional authorization. At a minimum, these votes will force Members of Congress to create a clear record of whether or not they support reasserting Congress’s constitutional role in decisions of war.
The broader context, however, makes the moment historic. The United States is once again engaged in a substantial military posture in the region, drawing comparisons to the buildup before the 2003 invasion of Iraq. Yet today’s risks may be far greater. The regional environment is more complex, the potential for escalation into a wider conflict is high, and any strikes against Iran could ripple across multiple theaters involving state and non-state actors. Limited military action could therefore spiral into a broader regional war with consequences far beyond any initial engagement.
How Does This Compare to Recent History?
The urgency of acting before hostilities begin is underscored by the events of the 12-day war of June 2025. During that period, the only war powers vote that managed to occur was in the Senate, and it took place after the United States had already struck Iranian nuclear facilities. Although a ceasefire followed, Congress was effectively responding to hostilities rather than exercising preventive authority. And the vote ultimately failed.
The current resolutions aim to change that dynamic. By holding votes before any new strikes, Congress can fulfill the preventive purpose embedded in the War Powers Resolution and the Constitution’s allocation of war powers to the legislative branch. The statute of the War Powers Act of 1973 was written to address situations involving a “clear and present danger of armed conflict,” not merely to react once combat has begun. This interpretation reflects Congress’s intent that it can and should act when the risk of war is imminent, even if shots have not yet been fired.
Bipartisan Dynamics and Signals
Historically, war powers votes have reflected cross-party consensus on the importance of congressional authorization for military action. Although Rep. Massie and Sen. Paul frequently occupy ideological outliers in this regard, other Republicans are increasingly voicing concerns about escalation and executive overreach.
For example, Warren Davidson has stated that he intends to support the House resolution, citing the dangers of military action without legislative approval. Likewise, James Lankford has publicly emphasized the risks of war. These positions illustrate that the current debate is not confined to one party.
War powers votes in the past have similarly produced bipartisan outcomes, underscoring that assertions of congressional authority over military action are rooted in constitutional principle rather than partisan preference. The signals from Rep. Davidson and Senator Lankford suggest that the upcoming votes could again reflect cross-party concern about the risks of escalation and the importance of legislative oversight. However, it remains to be seen just how many Republicans are willing to cross President Trump in his Iran endeavors.
What Is Ultimately at Stake?
The Khanna–Massie and Kaine–Paul resolutions are more than symbolic statements. They represent an effort to reassert congressional authority at a moment when the risks of miscalculation are extraordinarily high. Any strike against Iran carries a significant possibility of triggering a broader regional conflict, with consequences that could extend far beyond an initial exchange.
Iran’s recent unrest and the Iranian government’s most brutal crackdown response to the protests underscore the volatility of Iran’s internal political environment, but they also highlight the dangers of external military action that could inadvertently strengthen hardline actors and deepen instability. War would not resolve the underlying tensions or advance U.S. strategic objectives. Rather, it risks creating conditions of prolonged conflict that serve neither American interests nor the prospects for constructive change within Iran.
By voting before hostilities begin, Congress has an opportunity to uphold the constitutional design in which decisions of war require legislative authorization. Whether the resolutions pass or fail, the votes will serve as a defining test of congressional resolve. The outcome and the debate itself will shape how the United States approaches questions of war and peace in an unprecedented time.