"Sens. John McCain and Lindsey Graham issued a joint statement Thursday calling for military action, recommending an international coalition "to ground Assad's air force."
"We agree with the President that Assad has crossed a line with his latest use of chemical weapons. The message from the United States must be that this will not stand. We must show that no foreign power can or will protect Assad now. He must pay a punitive cost for this horrific attack," they said.
They added: "In addition to other measures, the United States should lead an international coalition to ground Assad's air force. This capability provides Assad a strategic advantage in his brutal slaughter of innocent civilians, both through the use of chemical weapons as well as barrel bombs, which kill far more men, women and children on a daily basis ... Ultimately, the grounding of Assad's air force can and should be part of a new comprehensive strategy to end the conflict in Syria."