Sen. Lindsey Graham Lindsey Olin GrahamSenate GOP aims to confirm Trump court pick by Oct. 29: report The Hill's Campaign Report: GOP set to ask SCOTUS to limit mail-in voting Senate GOP sees early Supreme Court vote as political booster shot MORE (R-S.C.) on Sunday said President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE previously came close to pulling U.S. troops out of South Korea and added that Trump will reconsider doing so if North Korea is "playing" him.

Graham said on CBS's "Face the Nation" that moving military dependents out of South Korea would signal that the U.S. is "preparing for military conflict." The senator added that the current engagements between the U.S. and North Korea could be "fruitful," but that "we're not out of the woods yet."

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“If [Trump] has to, he’ll use military force to stop a missile coming to America with a nuclear weapon on it," Graham said.

“We were really close to having to make that hard decision," he continued. "Now we have some time. Are they playing us? I don’t know. If they’re playing Trump, we’re going to be in a world of hurt because he’s going to have no options left. This is the last best chance for peace.”

Graham said on "Face the Nation" in July that he warned Trump during negotiations with North Korea that he has been "played" by Pyongyang.

Graham said Sunday that Trump was previously frustrated with North Korea "saying one thing and doing another," something Graham said prompted the president to consider withdrawing troops from South Korea.

The senator added that while that didn't happen, "the president is serious" about considering that option.

"The whole point here is President Trump has no place to kick the can," Graham said.

Defense Secretary James Mattis James Norman MattisBiden courts veterans amid fallout from Trump military controversies Trump says he wanted to take out Syria's Assad but Mattis opposed it Gary Cohn: 'I haven't made up my mind' on vote for president in November MORE said in June that the idea of pulling U.S. troops from South Korea is "not even a subject of discussions."