The Republican-majority US Senate has backed legislation to halt US military action against Iran, but ‌it was not immediately clear how it would affect the war as President Donald Trump’s administration negotiates a peace agreement with Tehran, Reuters reports.

The Senate voted 50-48 in favor of the concurrent resolution, which passed the House of Representatives early this ⁠month, reflecting growing concern even among some of Trump’s Republicans about the unpopular conflict.

The vote was nearly along party lines, with four Republicans joining all but one Democrat in favor. Two Republicans did not vote.

The resolution directs Trump to remove US armed forces from hostilities with or against Iran, but is likely to remain merely ‌a ⁠symbolic vote.

Under the 1973 War Powers Act, the measure does not get sent to the White House for Trump’s signature. However, the White House has insisted the legislation is not constitutional and ⁠thus not binding.

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