moscow russian president vladimir putin u.s. counterpart donald trump may discuss syria settlement asian economic summit vietnam next week ria news agency report saturday relations moscow washington sour since putin trump first meet g20 summit hamburg july discuss allegations russian meddle u.s. election agree focus good tie .. tensions rise conflict syria russia veto unite nations plan continue ongoing investigation chemical weapons .. syria settlement discuss agenda possible meet two presidents kremlin spokesman dmitry peskov quote say ria add common interest enough time discuss issue somehow another require cooperation peskov say trump tell fox news week possible would meet putin asia trip may meet putin say putin important help us north korea help us syria talk ukraine syria deal may agenda putin-trump asia meet report