Sen. Lindsey Graham Lindsey Olin GrahamSteele Dossier sub-source was subject of FBI counterintelligence probe Hillicon Valley: Subpoenas for Facebook, Google and Twitter on the cards | Wray rebuffs mail-in voting conspiracies | Reps. raise mass surveillance concerns Key Democrat opposes GOP Section 230 subpoena for Facebook, Twitter, Google MORE (R-S.C.) said Sunday that he plans to ask President Trump Donald John TrumpSteele Dossier sub-source was subject of FBI counterintelligence probe Pelosi slams Trump executive order on pre-existing conditions: It 'isn't worth the paper it's signed on' Trump 'no longer angry' at Romney because of Supreme Court stance MORE to reconsider his decision to withdraw U.S. troops from Syria when the two meet for lunch later in the day.

"I'm going to talk to him at lunch," Graham said on CNN's "State of the Union" when asked how he planned to convince Trump to rethink his decision.

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"The president is reconsidering how we do this," he added. "He's frustrated. I get it. People should pay more. They should fight more. But we're not the policemen of the world here. We're fighting a war against ISIS [the Islamic State in Iraq and Syria]. They're still not defeated in Syria."

GOP Sen. Lindsey Graham says he will meet with President Trump for lunch today to urge him to reconsider how the US will withdraw troops from Syria: "I'm asking the President to make sure we have troops there to protect us." #CNNSOTU https://t.co/XLBekAhrlW pic.twitter.com/Wv9rOKxpB8 — State of the Union (@CNNSotu) December 30, 2018

Graham has fiercely criticized Trump's decision to withdraw troops from Syria, saying earlier this month that it would be an "Obama-like mistake."

Graham said Sunday that the Kurds would get "slaughtered" if U.S. forces leave, adding that Trump's decision is being made against "sound military advice."

"I'm going to ask him to sit down with his generals and reconsider how to do this," Graham added. "Slow this down. Make sure that we get it right. Make sure ISIS never comes back. Don't turn Syria over to the Iranians. That's a nightmare for Israel."

Trump last week defended his decision to remove troops from Syria, saying during a visit to Iraq that he believes "a lot of people are going to come around to my way of thinking."

"It's not fair ... when the burden is all on us, the United States," he said at the time.