The U.S. Senate has rejected another attempt to limit President Donald Trump’s authority to use military force against Iran, as Democrats say they will continue pushing to rein him in.

Lawmakers voted 47 to 52 against a motion that would have allowed the proposal to move forward.

Two senators broke ranks, Republican Rand Paul and Democrat John Fetterman, by voting against their respective parties.

This is the fourth time Senate Democrats have forced a vote on the issue since the war began on February 28.

The proposal, led by Senator Tammy Duckworth, aimed to require the president to withdraw U.S. forces from any conflict involving Iran unless Congress formally approves it.

Speaking earlier, Duckworth warned about the ongoing situation, saying, “we cannot let this chaos continue unchecked.”

She added that lawmakers must take responsibility, saying, “As our troops continue to sacrifice whatever is asked of them, we senators need to do the absolute minimum required of us.”

Duckworth also called on the Senate to act, saying it must vote to “end Trump’s illegal war of choice.”

She urged Republicans to make a decision, saying, “My Republican colleagues have a choice also. It’s simple: they can vote with me to end this conflict and prove that they’re actually putting America first, or they can vote to put Trump’s ego first. With this war growing more and more out of control each day, it is clear that they cannot continue to do both.”

The vote came as tensions continue to rise, with President Trump recently stepping up his rhetoric towards Iran, including warning that a whole civilisation will die if the situation escalates further.