Here is part of Ted Cruz's press release from Saturday after Obama's remark:
I remain concerned that the mission proposed by the President is not in furtherance the vital national security interests of the United States. To date I have heard a great deal from the administration about punishing Bashir al-Assad for violating an “international norm” through the use of chemical weapons, and that this is why we must act against him. Abstract notions about international norms should never displace U.S. sovereignty to act, or refuse to act, for our national security.
Assad’s murderous actions have claimed the lives of more than a hundred thousand of his own people, which is a humanitarian tragedy. But our chief strategic concern should not be international norms; it should be preventing the chemical weapons from falling into the hands of al Qaeda or other terrorists who might use them against us and our allies. . . .