Their decision will actually count, says administration official
An administration
goes on the record to say while the the President Believes he has the authority to attack Syria with or without Congressional approval, he does not intend to launch such an attack without the backing of lawmakers:
President Barack Obama isn't likely to launch a military strike on Syria if Congress votes against doing so, a top national security official said Friday.
During an interview on NPR's "Morning Edition," Tony Blinken, Obama's deputy national security adviser, said "the president of course has the authority" to take limited military action in Syria with or without the approval of lawmakers, but "it's neither his desire nor intention to use that authority absent Congress backing him."
Assuming the White House doesn't quickly try to retract Blinken's words, this suggests that the vote in Congress really will determine whether or not we launch an attack.
Email your member of the House of Representatives, letting him or her know your opinion about a military strike on Syria—whatever your opinion may be.