Once the threat from Isis has been reduced or eliminated, "I think we can turn our attention directly to stabilising the situation in Syria", Tillerson said.
Sen. Lindsey Graham on Sunday took perhaps the most aggressive Washington stance on the country's simultaneous effort to defeat ISIS and solve the Syrian crisis - calling for more US troops in the terror fight and suggesting President Trump already has broad authority to order missile strikes on Syria.
United States warships deployed to the eastern Mediterranean launched a barrage of 59 Tomahawk missiles against Shayrat Airfield, southeast of the western Syrian city of Homs, on Friday.
MCMASTER: Well, I think what we should do is ask Russian Federation - how could it be, if you have advisors at that airfield, that you didn't know that the Syrian air force was preparing and executing a mass murder attack with chemical weapons?
Boris Johnson decided not go to Russian Federation amid growing pressure on President Vladimir Putin to cut his ties with Syria's Bashar al Assad in the wake of a suspected chemical attack that killed at least 87 people, including children.
Russian President Vladimir Putin and Iran's Hassan Rouhani said in a phone call that aggressive USA actions against Syria were not permissible and violated global law, the Kremlin said.
"The United States crossed red lines by attacking Syria, from now on we will respond to anyone, including America if it attacks Syria and crosses the red lines", the statement said.
The U.S. strike on a Syrian air base came in response to the Assad regime chemical weapons attack on the town of Khan Shaykhun, Idlib province, killing some 100 civilians and wounding hundreds of others, mostly children.
The U.S. strikes on the Syrian aerodrome, into which it had planned an investigation, is not related to attempts to learn about chemical weapons in Syria, spokeswoman of the Russian Foreign Ministry Maria Zakharova told the Rossiya 1 television channel on Saturday. "And Russia was never part of the targeting". Besides, under a Russian-US deal after the east Ghouta sarin gas incident in 2013, Damascus joined the Convention on the Prohibition of Chemical Weapons and agreed to destroy its stockpile under Organization for the Prohibition of Chemical Weapons (OPCW) oversight.
He also "raised eyebrows" on the Meet The Press set when called out Assad for flying bombing runs from the same air base the US attacked hours earlier. Black doesn't think Assad is behind the chemical attack on civilians.