Sen. Tim KaineTim KaineSanders calls on Trump to come to Congress over Syria strikes Kaine agrees with Haley: No political solution in Syria with Assad in power Sunday shows preview: White House officials talk Syria strike MORE (D-Va.) said Sunday he agrees with United Nations Ambassador Nikki Haley that there is not a "political solution to the civil war in Syria" if President Bashar Assad remains in power. Haley said she doesn't see a political solution in Syria with Assad remaining as president, but that other US priorities were defeating Islamic State and to "get the Iranian influence out". Once that threat "has been reduced or eliminated, I think we can turn our attention directly to stabilizing the situation in Syria", he said.

But Ms Haley warned that the USA was prepared to "do more" if needed, leaving the door open for more military intervention as the global community awaits a response from President Assad and his allies.

Although Tillerson said he has not seen "any hard evidence" that Russian Federation was involved in carrying out the attack, it did accuse Moscow of failing to keep its commitment to eliminate Syria's chemical weapons.

Haley did not say the United States had changed its policy. "But I think he will have to look at the situation", Haley told the CNN host when asked whether Trump "wants tougher sanctions on Russian Federation and Iran".

"And we believe that the first priority is the defeat of ISIS", Tillerson said in an interview with CBS television's "Face the Nation" that was to be broadcast later on April 9. As I said, again, taking this action, I support and was important.

He said it had failed to prevent Syria from carrying out a chemical attack on the rebel-held town of Khan Sheikhoun last Wednesday which left 89 people dead.

Speaking to host Chuck Todd, Graham made the case that not only does the current Authorization of the Use of Military Force cover the most recent missile strike, but that it also allows the send in ground troops to Syria, something he is calling for.

WALLACE: So, there is a possibility that President Trump, you are saying - leaving it wide open that he will act against President Assad if he goes against civilians no matter what weapon he uses? "What we saw was a reaction to the use of chemical weapons, something I think many of us supported", he said.

Tillerson said he would bring up the issue when he meets with his Russian counterpart this week for what is sure to be a less-than-comfortable sit-down. Meanwhile, ISIL militants launched two suicide attacks on USA -backed Syrian rebels near the border with Iraq, leaving at least 12 dead in the fighting and many wounded, rebels sources said on April 9. "What America waged in an aggression on Syria is a crossing of red lines".

"We don't see a peaceful Syria with Assad in there", she said.