Sen. Rand Paul, R-Ky., said Thursday he opposed President Trump’s strike against Syria because the U.S. has not been attacked by Syria, and said Trump should have sought congressional approval for the attack.

“While we all condemn the atrocities in Syria, the United States was not attacked,” Paul said. “The president needs congressional authorization for military action as required by the Constitution, and I call on him to come to Congress for a proper debate.”