Four Senate Republicans crossed party lines to approve the resolution, which passed the House of Representatives earlier this month.

The United States Senate has passed a bill to pause President Donald Trump’s military campaign against Iran and seek congressional approval before any further action is taken.

On Tuesday, the chamber voted 50 to 48 to pass the resolution, which had been approved in the House of Representatives earlier in the month.

Republicans hold a majority in the Senate, but four conservatives crossed party lines to approve the resolution, along with nearly all the chamber’s Democrats, save one.

The breakaway Republicans included Bill Cassidy of Louisiana, Lisa Murkowski of Alaska, Susan Collins of Maine and Rand Paul of Kentucky. The lone Democrat to side with Republicans on the matter was Pennsylvania’s John Fetterman.

Speaking on the chamber floor, top Democrat Chuck Schumer noted that Tuesday’s vote marked the 10th time the Senate had taken up a war powers resolution, to rein in Trump’s military campaign against Iran.

“For years Trump promised to put maximum pressure on Iran, but he ended up delivering maximum confusion, maximum chaos, maximum cost to the American people with his disastrous war,” Schumer said.

“ Time after time, the vast majority of Senate Republicans sided with Trump and his war, instead of the American people. The American people have paid the price for Trump’s historic blunder in Iran. It’ll go down in the history books as one of the worst foreign policy forays America has ever made.”

On February 28, Trump joined Israel in launching attacks against Iran, triggering a region-wide war that has continued through this month.

It was also the second time since returning to office for a second term that Trump involved US military forces in a war against Iran. In June 2025, Trump had also sent bombers to attack three key sites associated with Iran’s nuclear enrichment programme.

Trump has said the latest war was necessary to prevent Iran from developping a nuclear weapon, an ambition it has long denied.

But critics have characterised the February strikes as an unprovoked act of aggression that has threatened to further destabilise the Middle East.

Source: https://www.aljazeera.com/news/2026/6/23/us-senate-votes-to-halt-iran-war-bucking-trump?traffic_source=rss