Poe said he has proposed a resolution barring the use of federal funds to attack Syria, the latest expression of opposition to a military attack in Congress. Dozens of members have said they are opposed, and on Tuesday, some of them said they hope Russia has success in brokering an agreement that would see Syria voluntarily give up its chemical weapons.

Rep. Marcy Kaptur (D-Ohio) thanked Russia for intervening, a move many see as a possible way for the United States to avoid a military strike against Syria.

"Both Russia and the United States, as the world's premier nuclear powers, hold awesome responsibilities to move our world to a more peaceful and stable posture," she said. "My hope is that the Russian initiative gains momentum, and let all nations of goodwill on our globe find a way forward to address the tragic consequences of the Syrian civil war."

Rep. Tom McClintock (R-Calif.), who was already opposed to a strike against Syria, also said Russia's proposal should slow Obama's efforts to use the military.

"Russia's diplomatic intervention in the Syrian crisis is indeed welcome news," he said on the floor. "But whether it is real or illusory, the president needs to step back from the dangerous precipice he has brought us to."

McClintock added that U.S. credibility is threatened if the U.S. attacks Syria merely to back up what he called a "foolish and reckless" statement from Obama about Syria crossing a red line by using chemical weapons.

"The president has already made his case very clearly, and he is very clearly wrong," he said.