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 becoming a close ally of 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 has "absolutely" been worth it, pointing to the access to Trump it brought him.

"I feel like I’ve had more access to this president than every president combined. We don’t always agree," Graham said on CNN's "State of the Union."

GOP Sen. Lindsey Graham, who was Trump's campaign foe in 2016, on his close relationship with the President: “I feel like I’ve had more access to this President than every president combined … I’m generally very pleased.” pic.twitter.com/58JJXIwyTw — State of the Union (@CNNSotu) December 30, 2018

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Graham, who criticized Trump during his presidential campaign before becoming one of his closest allies in Congress, voiced opposition earlier this month to Trump's decision to withdraw U.S. troops from Syria, saying it would be an "Obama-like mistake."

The senator was also recently at odds with Trump over his decision not to severely punish Saudi Crown Prince Mohammed bin Salman following the murder of U.S. resident and journalist Jamal Khashoggi inside the Saudi consulate in Istanbul.

But Graham said Sunday that he has been "generally pleased" with Trump's decisions on foreign policy.

"He pulled out of the Iranian agreement, which was a nightmare. He’s increased military spending to a level that I could not be more pleased with. He changed the rules of engagement in Afghanistan, Iraq and Syria so [the Islamic State in Iraq and Syria] is just about destroyed," Graham said.

"All I ask him to do is make sure we don’t fumble the ball inside the 10-yard line," he continued. "Sit down with the generals to make sure we get Syria right.”

Graham added that Trump's decision to withdraw troops from Syria, which was quickly followed by the resignation of 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, "caught me by surprise."

"I fear it’s going to undercut all we have achieved," he said. "And I’ll ask the president to reconsider. And I think he’s going to sit down with his generals and make an informed, well thought out decision.”