Defense Secretary Mark Esper Mark EsperOvernight Defense: Stopgap spending measure awaits Senate vote | Trump nominates former Nunes aide for intelligence community watchdog | Trump extends ban on racial discrimination training to contractors, military Overnight Defense: Pentagon redirects pandemic funding to defense contractors | US planning for full Afghanistan withdrawal by May | Anti-Trump GOP group puts ads in military papers Official: Pentagon has started 'prudent planning' for full Afghanistan withdrawal by May MORE confirmed Sunday that President Trump Donald John TrumpFederal prosecutor speaks out, says Barr 'has brought shame' on Justice Dept. Former Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick MORE has ordered a larger withdrawal of U.S. forces from northeastern Syria than was previously indicated.

During an appearance on CBS’s “Face the Nation,” Esper said the U.S. has withdrawn about 1,000 U.S. troops from northern Syria since an initial smaller withdrawal of troops.

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Trump made the decision to increase the withdrawal amid reports that Turkey will expand its offensive “further south than originally planned and to the west,” Esper told CBS’s Margaret Brennan on Sunday.

Esper also referenced reports that the Syrian Democratic Forces, a Kurdish group allied with the U.S. in the battle against ISIS, are seeking an agreement with the Syrian and Russian governments.

“And so we find ourselves as we have American forces likely caught between two opposing advancing armies, and it's a very untenable situation,” Esper told Brennan.

“So I spoke with the president last night after discussions with the rest of the national security team, and he directed that we begin a deliberate withdrawal of forces from northern Syria,” he said.

Pressed by Brennan on whether Turkish forces would be advancing if U.S. forces remained, Esper said that in talks with other officials, “it became very clear to me that the Turks were fully committed to conducting this incursion” regardless of the U.S. presence.

Trump’s decision to withdraw U.S. troops from northeastern Syria and to turn over operations to Turkey has been met with sharp bipartisan criticism, with staunch Trump backers such as Sen. Lindsey Graham Lindsey Olin GrahamLincoln Project mocks Lindsey Graham's fundraising lag with Sarah McLachlan-themed video The Hill's Morning Report - Sponsored by Facebook - Republicans lawmakers rebuke Trump on election Trump dumbfounds GOP with latest unforced error MORE (R-S.C.) accusing him of abandoning an ally and creating an opening for ISIS forces to return to their former strength.