President of the U.S. Donald Trump called on his Russian counterpart Vladimir Putin to stop supporting Bashaar al-Assad and the government of Syria. Trump said so during his phone conversation with Turkish President Recep Tayip Erdogan; DW wrote that the U.S. leader is concerned about the degree of violence in Syria's Idlib province.
Idlib is one of the areas where Syrian government, supported by the Russian military contingent, confronted Turkey. On February 10, Turkish armed forces landed an attack on Syrian government troops, hitting 115 targets. At least 101 servicemen were killed in action, according to the Turkish side. This was the response to the Syrian artillery attack on Turkish positions, which killed five militaries and wounded another five.
Trump also claimed that the U.S.-Turkey relations grew more complicated after Ankara accepted Russia-made S-400 surface-to-air missile systems. After the negotiations between Trump and Erdogan in November, the relations improved. "I'm a big fan of the president. We have great relations", Trump said back then.