US Gen. Joseph Votel, top U.S. commander in the Middle East, speaks to reporters during an unannounced visit Monday, Oct. 22, 2018, to the al-Tanf military outpost in southern Syria. The U.S. trains Syrian opposition forces at the outpost. (AP Photo/Lolita Baldor)
General Joseph Votel, the top US commander in the Middle East, at Al Tanf military outpost in Syria. Lolita Baldor / AP

US and Turkey could influence the political outcome in Syria – if they put their differences behind them