Two White House officials have reported a "tense" phone call between President Trump and Israeli Prime Minister's regarding the possibility of pulling out of Syria. Netanyahu reportedly fears that the US withdrawing would allow both Syria and Iran to muster forces near Israel's border. A statement released following the call stated that the call involved "recent developments in the Middle East," in which the president "reiterated the commitment of the United States to Israel’s security and the two leaders agreed to continue their close coordination on countering Iran’s malign influence and destabilizing activities."
Just last week, President Trump had announced that the US would be "coming out of Syria, like, very soon. Let the other people take care of it now." This runs completely counter to the US State Department who claimed they have no knowledge of any plans to withdraw US troops from the region.
Assad is supported by Russia and the Shi'ite militants that are, in turn, backed by Iran. He has stated his plan is to take back the entirety of Syria. The US-led coalition that was set up in 2014 to battle the Islamic State in Syria and Iraq has been, for the most part, successful in turning the tides on ISIS. Ironically, much evidence exists to suggest that ISIS grew out of the rebellion forces comprised of "moderate Muslims" who were armed, funded and trained to take down Assad in the first place. At one point last year it was reported that <a href="http://www.latimes.com/world/middleeast/la-fg-cia-pentagon-isis-20160327-story.html">CIA-armed militias were firing on CIA-backed militias</a>.
Currently, around 2,000 US forces remain with boots on the ground in Syria working alongside Kurdish-led SDF alliance.