from the New York Times:

In an afternoon appearance in the Rose Garden, Mr. Obama said he had decided that the United States should use force but would wait for a vote from lawmakers, who are not due to return to town until Sept. 9. Mr. Obama said he believed he had the authority to act on his own, but he did not say whether he would if Congress rejects his plan.

Update:

At today's Angelus in Saint Peter's Square Pope Francis, living up to his name, called for a day of prayer to resolve the conflict in Syria peacefully:

Pope Francis has called for a day of fasting and prayer for peace in Syria, in the entire Mideast region, and throughout the whole world to be held this coming Saturday, September 7^th, 2013. Speaking ahead of the traditional Angelus prayer with pilgrims gathered in St Peter’s Square this Sunday, Pope Francis said, “On [Saturday] the 7^th of September, here [in St Peter’s Square], from 7 PM until midnight, we will gather together in prayer, in a spirit of penitence, to ask from God this great gift [of peace] for the beloved Syrian nation and for all the situations of conflict and violence in the world.” The Holy Father also invited non-Catholic Christians and non-Christian believers to participate in ways they feel are appropriate. “Never again war!” said Pope Francis. “We want a peaceful world,” he said, “we want to be men and women of peace.”