With the support of Kansas Republican Jerry Moran, the Senate is expected to pass a bipartisan resolution to restrict President Trump's war powers. (USA Today)
The debate, which begins Wednesday, comes amid ongoing questions about Trump's controversial decision to authorize a drone strike killing Iran's most powerful military leader in January.
Senate Democrats say they have enough Republican support to win passage of the measure, which would bar Trump from using military force against Iran unless Congress specifically voted to authorize such action.
“We now have a majority of colleagues, Democratic and Republican, who will stand strong for the principle that we shouldn't be at war without a vote of Congress," Sen. Tim Kaine, D-Va., said in January.
Kaine's announcement coincided with the revelation that Kansas Republican Jerry Moran will support the resolution.
Democrats say Trump acted recklessly when he green-lighted the deadly attack on Iranian Gen. Qasem Soleimani – a decision that heightened U.S.-Iranian tensions and sparked fears of a broader conflict in the Middle East.
Moran agrees, saying in a statement: "The prospect of military action against Iran has consequences that ought to be considered by the full Congress, on behalf of the people it represents."
Four other Republican senators are expected to vote for the resolution. There are Sens. Susan Collins (Maine), Mike Lee (Utah), Rand Paul (Ky.), and Todd Young (Ind.).