"At a White House news conference on Tuesday, Trump said the USA has spent more than "$7 trillion in the Middle East over the last 17 years", a figure he's repeatedly cited without documentation.
Mr Trump has repeatedly expressed a desire to withdraw USA troops from Syria "very soon", despite delaring in January that it was "vital for the United States to remain engaged in Syria".
US President Donald Trump has said that his primary mission is to defeat the ISIS and once that is done, he would like to bring the troops back from Syria.
"The military mission to eradicate ISIS in Syria is coming to a rapid end, with ISIS being nearly completely destroyed", the White House said. "We've completed that task and we'll be making a decision very quickly, in coordination with others in the area, as to what we will do".
The announcement comes less than 24 hours after Trump said he wants to bring troops home.
President Donald Trump had said a day earlier that the U.S.'s primary mission was to defeat IS and "we've nearly completed that task".
Trump's remarks follow comments last week when he vowed USA forces would soon quit Syria even as some of his top officials stressed the need to stay for the long term to stabilise areas freed from IS.
Brett McGurk, the U.S. envoy to the coalition against IS, said the fight against the militants was not over.
Yet some of his military advisers spoke at a separate event in Washington about the need to stay in Iraq and Syria to finish off IS, especially remnants of IS in eastern Syria.
A senior Syrian Kurdish official said Trump's comments came at an "inappropriate time" as Islamic State militants re-emerge in eastern Syria and amid threats from Turkey.
The head of the US Central Command, General Joseph Votel, noted that there remain the challenges of stabilizing the areas and getting people back into their homes, indicating that the US military has a role to play. The National Security Council did not immediately respond to a question from Task & Purpose about whether the United States has asked the Saudis to throw in some cash for US troops in Syria.
"What this means for us", Votel said, "is that we're going to have to look at the ways that we keep pressure on ISIS and continue to develop mechanisms on the ground that help us de-escalate the situation" in Afrin, "so that [it] can be addressed by discussion and diplomacy as opposed to fighting".
At a campaign rally in OH last week, the president promised to withdraw United States troops "very, very soon". Last month, the former general warned that Iran was building a "permanent military foothold" in the war-torn country that would "threaten Israel" and challenge United States interests throughout the greater Middle East. "I want to start rebuilding our nation", Trump said during an press conference at the White House.
The presidents of Iran, Turkey and Russian Federation meet on Wednesday for their second tripartite summit in under six months, aiming to speed the peace process for Syria and bolster their influence in the country.
Russian Foreign Minister Sergey Lavrov told a press conference Monday that, while he found Trump's words encouraging, the USA has recently only become more entangled in the seven-year civil war in Syria, where the Moscow-backed government considered the US and Turkey to be invading forces.
While Russia is calling for American forces to withdraw, it hasn't sought a complete break with the U.S. In Moscow's preferred scenario, Assad would regain control of the whole of Syria; his rule would receive global assent through United Nations peace talks; and the wealthy West would chip in to finance reconstruction. The latter has been the site of most recent US airstrikes in Syria.
Trump reiterates necessity for U.S. troops to leave Syria unless Riyadh pays for continuation of U.S. presence there.