US troops scramble for the exits in Syria

Turkey's President Recep Tayyip Erdogan speaks to Turkish journalists, in Istanbul, Sunday, Oct. 13, 2019. Erdogan has rejected offers for mediation with Syrian Kurdish fighters as the Turkish military continues its offensive against them in northern Syria. (Presidential Press Service via AP, Pool)
FILE - In this Aug. 28, 2019, file photo, Secretary of Defense Mark Esper speaks to reporters during a briefing at the Pentagon. Esper says the "impulsive" decision by Turkey to invade northern Syria will further destabilize a region already caught up in civil war. Esper says the invasion puts America's Syrian Kurdish partners "in harm's way," but insists the Kurds are not being abandoned. (AP Photo/Manuel Balce Ceneta, File)
A Turkish youth celebrates with a national flag after news about Syrian town of Tal Abyad, in Turkish border town of Akcakale, in Sanliurfa province, Sunday, Oct. 13, 2019. Turkey's official Anadolu news agency, meanwhile, said Turkey-backed Syrian forces have advanced into the center of a Syrian border town, Tal Abyad, on the fifth day of Turkey's military offensive. (Ismail Coskun/IHA via AP)
In this photo taken from the Turkish side of the border between Turkey and Syria, in Akcakale, Sanliurfa province, southeastern Turkey, smoke billows from fires on targets in Tel Abyad, Syria, caused by bombardment by Turkish forces, Sunday, Oct. 13, 2019. The United Nations says at least 130,000 people have been displaced by the fighting in northeastern Syria with many more likely on the move as a Turkish offensive in the area enters its fifth day. (AP Photo/Lefteris Pitarakis)

WASHINGTON — U.S. troops scrambled for Syria’s exits Monday while the Trump administration threatened economic penalties on Turkey for an invasion that opened the door to a resurgence of the Islamic State group — the fighters who were the reason U.S. forces came in the first place.