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 on Monday said that his decisions to “slowly” bring U.S. troops home from Syria is delivering on a campaign promise to withdraw troops from the war-torn nation.

Trump said that “if anybody but Donald Trump” had made the move, they would be lauded as a “national hero.”

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"If anybody but Donald Trump did what I did in Syria, which was an ISIS loaded mess when I became President, they would be a national hero," Trump tweeted. "ISIS is mostly gone, we’re slowly sending our troops back home to be with their families, while at the same time fighting ISIS remnants."

If anybody but Donald Trump did what I did in Syria, which was an ISIS loaded mess when I became President, they would be a national hero. ISIS is mostly gone, we’re slowly sending our troops back home to be with their families, while at the same time fighting ISIS remnants...... — Donald J. Trump (@realDonaldTrump) December 31, 2018



Trump said he campaigned on withdrawing from Syria "and other places" and that he was against "never ending wars."

"Now when I start getting out the Fake News Media, or some failed Generals who were unable to do the job before I arrived, like to complain about me & my tactics, which are working," he tweeted. "Just doing what I said I was going to do!"

...I campaigned on getting out of Syria and other places. Now when I start getting out the Fake News Media, or some failed Generals who were unable to do the job before I arrived, like to complain about me & my tactics, which are working. Just doing what I said I was going to do! — Donald J. Trump (@realDonaldTrump) December 31, 2018

The president has been defensive of his decision to pull U.S. troops out of Syria, which he abruptly announced earlier this month, after facing backlash from both sides of the aisle. While he initially said ISIS had been defeated, he has since tempered those comments to state that the extremist group is "mostly" wiped out.

His Monday tweet indicated that troops would "slowly" return home while continuing to fight "ISIS remnants."

Critics have warned that the group is not defeated and that a U.S. withdrawal from Syria could lead to its resurgence. Those opposing the decision have also noted that U.S. adversaries like Russia will benefit from the absence of American forces.

Outgoing Secretary of Defense 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 resigned following Trump's withdrawal announcement.

Retired Gen. Stanley McChrystal was also critical of Trump's decision during an interview with ABC's "This Week" that aired Sunday.

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.), who has emerged as one of Trump's staunchest supporters in the Senate, has been outspoken in his opposition to the move, calling it an "Obama-like mistake." But the senator appeared more open-minded to the decision after dining with Trump on Sunday.

"We talked about Syria and he told me some things I didn’t know that made me feel a lot better about where we’re headed in Syria," Graham told reporters.

Some lawmakers have offered praise for Trump's decision, arguing that the U.S. lacked a long-term strategy in Syria.

The exact timetable for the troops withdrawal is unclear. While Trump said Monday that troops will "slowly" return to the U.S., other reports have indicated he plans to "immediately" remove 2,000 troops from northern Syria.

Syria has been ravaged by civil war, and hundreds of thousands of civilians have been killed.