Syrian opposition groups have voiced skepticism about Obama's commitment.
The comments come as France seeks more cooperation with Russia.
The draft proposal does not call for Assad to leave power.
The Kentucky senator says backing war in Syria is "a recipe for disaster."
He said the plan to train Syrian rebels was "highly fanciful."
The GOP contender says the refugees should be settled in Muslim countries.
Russia's strikes in Syria, she says, "are to shore up and stabilize the Assad regime."
The next major terrorist attack against the United States will likely be hatched in Syria, GOP...
“He has always dealt from a position of weakness,” he said of Obama.
Four senators called the civil war "the world's worst humanitarian crisis in recent times."
Obama reportedly also foresaw the ISIS conflict as a long-term battle.
Opposition suffers at hands of Assad and ISIS while U.S.-led training fails to materialize.
Retired Amb. Ryan Crocker is calling for the US to impose no-fly zones in Syria.
"Donald has got a bad deal in the making," Graham said of Trump's position on Syria.
“It made me feel so sad that the Democratic Party has dropped so far," he said.
"Maybe he should do all of us a favor [and] start building his library now."
The Foreign Relations chairman says Kerry isn't responding to lawmaker concerns on Syria.
Rubio said Russia was targeting non-ISIS rebel groups to prop up Assad.
Sen. Robert Casey, Jr. (D-Pa.), wants the U.S. to do more to combat the country's humanitarian...
Putin is one of the top patrons of Syrian President Bashar Assad.
Israeli commandos killed the general at his seaside villa.
“There's no dialogue, there's – let's say, information – but there's no dialogue,” Assad said.
The U.S. has neutralized nearly 600 tons of Assad's lethal chemical agents.
Members of the House Armed Services Committee want more specifics from Obama.