FILE In this file photo taken on Monday, July 16, 2018, U.S. President Donald Trump shakes hand with Russian President Vladimir Putin at the end of the press conference after their meeting at the Presidential Palace in Helsinki, Finland. The pullout of U.S. troops from Syria ordered by President Donald Trump could further bolster Moscow’s clout in Syria, but it may also destabilise Russia's standing in the region. (AP Photo/Alexander Zemlianichenko, File)