Sen. Bob Corker (R-Tenn.) said draft language in the START treaty between the U.S. and Russia was improved markedly during the Senate's August recess, and that he is now considering supporting the treaty.

The Foreign Relations Committee that Corker sits on is scheduled to vote on the treaty on Thursday. So far, the only Republican to support the treaty is ranking member Richard Lugar (Ind.).

"Obviously I want to support it, and we spent a lot of time over the last three weeks working on the draft," Corker said. "It's my hope to be able to do that. Lugar's made a very good effort. We're making additional revisions, but our staffs have been working very hard and we'll be working on it again tomorrow. I'm very hopeful."