Rep. Scott Rigell (R-Va.), who represents a coastal Virginia district rife with current and former military personnel, wrote in the letter that "engaging our military in Syria when no direct threat to the United State exists and without prior congressional authorization would violate the separation of powers that is clearly delineated in the Constitution.”
Most signers are Republicans, according to Rigell’s office. Democratic Reps. Beto O’Rourke (Texas), Gene Green (Texas), Zoe Lofgren (Calif.), Peter DeFazio (Ore.), Kurt Schrader (Ore.) and Rush Holt (N.J.) have also signed on.
(PHOTOS: International response to Syria)
The letter notes that the lawmakers believe Obama should have asked Congress for permission when he sent cruise missiles and bombs into Libya. "If the use of 221 Tomahawk cruise missles, 704 Joint Direct Attack Munitions, and 42 Predator Hellfire missiles expended in Libya does not constitute ‘hostilities,’ what does?” the signers ask.