WASHINGTON DC — U.S. lawmakers split along party lines in response to the failure of marathon peace talks in Pakistan to end the war between the United States and Iran. A two-week ceasefire between the two countries remained in effect as the political debate over next steps intensified in Washington.

Former U.S. Ambassador to the United Nations Nikki Haley told CNN's State of the Union that the ceasefire was a test of nerves. "This is like a game of chicken. It's who caves first." she said. "The Iranian regime is hoping that Trump will cave. Today, he showed he's not."

Haley said that targeting Iran economically would bring the country to its knees. She also proposed that the U.S. could launch a small special forces operation to seize Iran's supplies of enriched uranium. "This is a special forces mission. It would take about a week to 10 days to get done. They know how to do it." Haley said.

U.S. Senator Ron Johnson also called for an aggressive posture, advocating for the total removal of the Iranian regime and describing the effort as a longer-term task. "We have to finish the job. We will not have won until we have completely defanged the Iranian regime." Johnson said.

U.S. Senator Tim Kaine, who sits on the Senate Armed Services Committee and the Senate Foreign Relations Committee, said he would press again for a war motion in the Senate in the coming days to try to stop President Donald Trump from resuming full-scale hostilities. "Returning to full war will just compound the suffering of American troops and the American citizenry who are suffering under a devastated economy because of what Donald Trump has done." Kaine said. "We shouldn't be in this war to begin with. Donald Trump launched this war without the support of allies, the American public, or Congress."

Hours after the Pakistan talks ended without result, Trump threatened that the U.S. military would blockade the Strait of Hormuz to prevent Iran from profiting from its control of the shipping passage. Republican lawmakers have also sought to prevent Iran from acquiring nuclear weapons by seizing its enriched uranium supplies.