United States: Senate and House unite to challenge Trump’s Iran war authority

Both chambers of Congress have passed legislation seeking to end US military hostilities against Iran under the War Powers Act

PGurus Newsdesk

June 24, 2026

The US Senate joined the House in approving a war powers resolution aimed at ending American military involvement in the conflict with Iran

Senate approved a war powers resolution directing President Donald Trump to end US military involvement in Iran

In a significant challenge to President Donald Trump‘s foreign policy, the US Senate on Tuesday approved legislation directing the administration to halt American military operations against Iran.

The Senate passed the war powers resolution by a vote of 50-48, days after the House of Representatives approved the same measure. The vote reflects growing concern within Congress, including among some Republicans, over the conflict that began on February 28.

Historic congressional action

The resolution marks the first time both chambers of Congress have passed legislation directing a president to remove US armed forces from an ongoing military conflict under the War Powers Resolution of 1973, commonly known as the War Powers Act.

The measure seeks to reassert Congress’s constitutional authority over decisions involving military action and prolonged hostilities.

Republican support adds pressure

The Senate vote was largely divided along party lines, though four Republican senators joined Democrats in backing the resolution. Only one Democrat voted against the measure, while two Republican senators did not participate in the vote.

In the House, the resolution passed by a margin of 215-208, with four Republicans crossing party lines to support the legislation alongside Democrats.

The bipartisan support underscores growing unease in Washington over the political and military costs of the conflict.

Legal battle likely

Despite the congressional vote, the resolution is unlikely to have an immediate practical impact on US military operations.

Under the War Powers Act, the measure does not require the president’s signature and is not sent to the White House for approval. However, the Trump administration has argued that the resolution is unconstitutional and therefore not legally binding.

Legal experts say the issue could ultimately be decided by the courts.

Scott Anderson, a senior fellow at the Brookings Institution, said the executive branch is likely to ignore the resolution on constitutional grounds, though legal challenges could follow.

Uncertain impact on peace efforts

The vote comes as the Trump administration continues diplomatic efforts aimed at securing a broader agreement with Iran and stabilising the region following months of conflict.

While largely symbolic for now, the resolution represents one of the most significant congressional rebukes of Trump’s presidency and signals increasing willingness among lawmakers to challenge the administration’s handling of the Iran conflict.

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