He also falsely claimed the Kurds "are much safer now," despite his recent decision to pull US forces out of northern Syria -- where the US was fighting alongside Kurds in the region.
"Our soldiers are not in harm's way, as they shouldn't be, as two countries fight over land that has nothing to do with us. And the Kurds are much safer now. The Kurds know how to fight and as I said, they're not angels," Trump said during an Oval Office meeting with Italian President Sergio Mattarella.
"But they fought with us. We paid a lot of money for them to fight with us and that's OK. They did well when they fought with us. They didn't do so well when they didn't fight with us," he added.
South Carolina Republican Sen. Lindsey Graham, one of Trump's closest allies on Capitol Hill, slammed the President's comments Wednesday, saying they completely undercut diplomatic efforts by Vice President Mike Pence and Secretary of State Mike Pompeo who are about to travel to Turkey.
"I hope President Trump is right in his belief that Turkeys invasion of Syria is of no concern to us, abandoning the Kurds won't come back to haunt us, ISIS won't reemerge, and Iran will not fill the vacuum created by this decision. However, I firmly believe that if President Trump continues to make such statements this will be a disaster worse than President Obama's decision to leave Iraq," Graham tweeted.
"The statements by President Trump about Turkey's invasion being of no concern to us also completely undercut Vice President Pence and Sec. Pompeo's ability to end the conflict," he added.
Despite earlier reports to the contrary, Pence and Pompeo are expected to meet with Turkish President Recep Tayyip Erdogan on Thursday to discuss the situation in Syria, according to a spokesman for the Turkish presidency.
Trump directed the high-profile delegation that includes Pence, Pompeo and national security adviser Robert O'Brien to broker a ceasefire with Ankara amid the Turkish incursion into Syria.
But a challenging trip was made even more tricky when Trump appeared to undermine its purpose in remarks at the White House on Wednesday, saying that the US "shouldn't be losing lives" because "it's not our border."
During his Oval Office remarks, Trump also defended withdrawing troops from northeastern Syria by saying that sanctions on Turkey are more effective at maintaining stability between the Turks and Kurds.
Trump also cited Kurds leaving US forces fighting against Iraq when the US did not fund them.
"The Kurds are actually pulling back substantially from Turkey and Syria's pulling in," he added.
He also said that Russian support in Syria is "fine" with him, adding that Russia can handle the battle against ISIS there.
"Syria will probably have a partner of Russia ... I wish them a lot of luck," Trump said.
"If Russia wants to get involved with Syria -- that's really up to them," he added. "They have a problem with Turkey, they have a problem at the border -- it's not our border. We shouldn't be losing lives over it."
"By the way, every player hates ISIS ... Syria more than us. Russia more than us. They've done a big number on Russia. And we're over there fighting ISIS. But they're over there fighting ISIS too. They can handle it. And they should handle it. We can fight our own battles on our own territories," he later added.
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