Washington, August 29 (RHC)-- A group of nearly 200 retired U.S. military generals and admirals have sent a letter to the U.S. Congress, urging lawmakers to reject the Iran nuclear accord.

The letter was sent to Capitol Hill by retired generals and flag officers from every branch of the U.S. armed forces, including military officers who served in the White House, under Democratic and Republican administrations.

Retired Lt. Gen. Jerry Boykin, who was deputy undersecretary of defense under George W. Bush, is among the signatories of the letter. The letter described the agreement as a "threat" to U.S. national security as well as to Washington’s interests and allies in the Middle East.

“The agreement will enable Iran to become far more dangerous, render the Mideast still more unstable and introduce new threats to American interests as well as our allies,” the letter states. It is the latest petition that called on American lawmakers to support or reject the nuclear deal.

Earlier this month, 36 retired generals and admirals published an open letter in the Washington Post in support of the agreement.

U.S. President Barack Obama says he is confident that the agreement between Iran and the world powers will go forward despite opposition from Republican lawmakers in Congress. Despite the opposition, however, political analysts do not believe there will be enough votes to override Obama’s veto of a congressional resolution against the deal.

The U.S. Congress will vote on the July accord, known as the Joint Comprehensive Plan of Action, in September.