Senators emerging from a classified Senate Foreign Relations Committee briefing said Wednesday that they hope to agree on a draft resolution by the end of the day to authorize the use military force in Syria.
Senators were behind closed doors for over three hours as Secretary of State John Kerry and committee leaders tried to build enough support to make sure the resolution can pass in the committee.
They are trying to balance concerns from some lawmakers wary of prolonged, unlimited intervention -- and those who want to go farther than just limited strikes.
Sen. John McCain, R-Ariz., is one of the hawks. He said earlier Wednesday that he couldn't support the current resolution.
McCain is now working on amendment that would outline what he claims the administration told him should be the policy in Syria -- changing the momentum on the battlefield and supporting the Free Syrian Army with more weaponry.
Sen. Chris Coons, D-Del., also has an amendment that would require that the administration more definitively outline how the U.S. interacts with regional allies, deals with refugees and secures weapons of mass destruction.
The official markup to make changes will begin later this afternoon, and votes on amendments are planned.
Several senators said they expected a final vote on the authorization later Wednesday.
Sen. Bob Corker, R-Tenn., the committee's ranking member, said they could likely finish the work tonight, though he added that members were prepared to work later into the week and into the weekend to finish it.