Republican Senate candidates Susan Collins of Maine and Ashley Hinson of Iowa gave different answers on Congress's role in ending the Iran war in separate debate clips aired by CNN on October 14. The debates took place on October 13.

Collins, Maine's incumbent senator, said she had voted with Democrats to bring the war to an end, but there had not been enough votes. She also said President Donald Trump had not had a good plan for the war.

Hinson, an Iowa House member running for the Senate, was asked whether she would change her vote on the War Powers Act to end the conflict. She said she did not think another resolution on the House floor was needed and expressed confidence that the president and the U.S. military could end the war.