Rep. Jared Golden, who represents Maine's 2nd Congressional District, made the comments during an interview on Wednesday.
Iran recently broke the terms of an Obama-era nuclear deal -- a deal from which President Trump and the U.S. withdrew.
This week, officials in the Middle Eastern country warned they will continue to violate the deal while harsh U.S. sanctions are in place.
The president promised more sanctions are on the way.
Congressman Golden said the U.S. has a long-standing policy of stopping rapid increases in nuclear weapons -- which is what Iran is pursuing.
"I think we need to find the right balance here to be strong, to make sure that we are keeping them in check, while also making every effort to use diplomacy and stay out of more wars in the Middle East, particularly those that require boots on the ground," he said.
Golden, who served in Iraq and Afghanistan and serves on the Armed Services Committee, said the Middle East has always been an area of high tension.