The US Senate is advancing a bill to restrict Trump's use of military force against Iran.

The US Senate has advanced a bill aimed at restricting President Trump's power to use military force, requiring that any military action against Iran by him in the future must be approved by the Congress.

CNN reported that the Senate, led by the Republicans, passed this bill on Tuesday (May 19th) with a vote of 50 in favor and 47 against.

Previously, the Senate had rejected similar efforts seven times. Although this time the bill was passed, it still needs to go through several procedures before it can come into effect.

CNN reports that when the Senate voted on Tuesday, some senators were conducting campaign activities in their respective districts, and several Republicans were absent from the vote. Therefore, the chances of the bill passing in the final vote are not high.

The AFP reported that the war in Iran has entered its third month, and the US military's weapons reserves are under pressure, with its military preparedness capabilities being questioned. According to official estimates, the US has spent over 30 billion US dollars  on this war so far.

Senate Minority Leader Chuck Schumer said in April that in the foreseeable future, as long as the Senate is in session, Democrats will push for a war authorization vote every week.

Some Republicans had said that Congress should play a role in authorizing wars, at least by strengthening oversight. However, Senate Majority Leader Thune told reporters that the majority of party members did not push for a vote on war authorization.