An official press release by White House, U.S. Senate, and a U.S. Congressman French Hill confirm the claim.
A press release by the U.S. Congressman French Hill on 08 October 2019, states that Senate Majority Leader Mitch McConnell warned against a withdraw of US Military that it would benefit Russia, Iran, the Islamic State militant group and Syrian President Bashar Assad and urged Trump to exercise American leadership.
As per the press release by the U.S. Senate, Chris Murphy criticized U.S President Donald Trump for the announcement of the withdrawal of US troops from Northern Syria without a strategy to complete the mission.