Signatures of sarin, so this case is building and this case will build. Reporter president obamas decision to seek congressional approval means a military strike may well hinge on the house of representatives, which wont return until september 9th. We cant be waiting ten days and allowing syria to prepare for this and sending mixed signals to the world. Reporter but it does give the white house precious time to win over skeptics in both parties. I think the line in the sand should be that america gets involved when american interests are threatened. Im certainly a skeptic going in, but im going to allow the administration to present its evidence to congress. Reporter after hearing that evidence for the first time, some lawmakers backed the president. Im a yes. Reporter while others left unconvinced. I honestly cannot say. Im not there yet. In my mind, its far from t sett settled. Reporter voices of doubt suggesting the white house has some selling to do. This is a political gamble for