US Senate Moves to Limit Trump's Military Powers in Iran

May 20, 2026

72 min

May 20, 2026 01:30

US Senate passes resolution to limit President Trump's war powers in Iran — what's next

## Senate Vote on War Powers

The US Senate has passed a resolution aimed at curbing President Donald Trump's authority to initiate military actions against Iran without congressional approval. The procedural vote saw a narrow 50-47 outcome.

## Bipartisan Support

While most Democrats supported the measure, Democratic Senator John Fetterman opposed it. Notably, four Republican senators—Rand Paul, Susan Collins, Lisa Murkowski, and Bill Cassidy—joined Democrats in advancing the resolution. Cassidy's vote was particularly significant as it marked his first alignment with Democrats following a recent primary defeat.

## Historical Context

This resolution is the eighth attempt by Senate Democrats to limit presidential war powers concerning Iran. Previous efforts have been unsuccessful, with the Senate rejecting similar measures at least seven times.

## Future Prospects

Despite the recent vote, the resolution faces challenges in securing final approval. Several Republican senators were absent due to campaign commitments, which could affect future votes.

## Political Reactions

Democratic Senator Adam Schiff emphasized the need to end "unconstitutional wars," while Senator Bernie Sanders highlighted public opposition to "endless wars." Both senators expressed hope that the resolution would lead to a more restrained military policy.

## Ongoing Negotiations

The vote coincides with ongoing US-Iran peace negotiations. President Trump recently announced a pause in planned military action against Iran, following requests from leaders in Qatar, Saudi Arabia, and the UAE. Trump indicated that military plans could resume if a satisfactory agreement is not reached.

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