WASHINGTON (Reuters) - U.S. Secretary of State John Kerry said on Wednesday lawmakers cannot modify any agreement struck between the United States and Iran despite threats by Republican senators that they can.
In congressional testimony, Kerry said he responded with "utter disbelief" at an open letter signed by 47 Republican senators that threatened to undo any nuclear agreement reached between Tehran and Washington.
"It is incorrect when (the letter) says that Congress can actually modify the terms of an agreement at any time. That is flat wrong," Kerry told the Senate Foreign Relations Committee, which includes Senator Tom Cotton, the Republican from Arkansas who wrote the letter.
(Reporting by Lesley Wroughton; Editing by Doina Chiacu)