"The key is, to paraphrase Ronald Reagan, that we don't just trust, but we also verify," Obama said in an interview with CBS. "The importance is to make sure that the international community has confidence that these chemical weapons are under control, that they are not being used, that potentially they are removed from Syria and that they are destroyed."
The dramatic shift in the president's tone came after weeks of threatening tough reprisals on the Assad regime and in the face of stiff resistance in Congress to any resolution that would authorize him to use military force.
A majority of the senators staking out positions or leaning in one direction are expressing opposition, according to an Associated Press survey. The count in the House is far more lopsided, with representatives rejecting Obama's plan by more than a 6-1 margin even as the leaders of both parties in the House professed their support.
On Tuesday, Senate Republican leader Mitch McConnell became the first congressional leader to come out against the resolution giving the president authority for limited strikes.
"There are just too many unanswered questions about our long-term strategy in Syria," he said in a speech on the Senate floor.
A bipartisan group of eight senators started writing an alternative resolution that would call on the United Nations to state that Syria used chemical weapons and require a U.N. team to remove the chemical weapons from Syria within a specific time period, possibly 60 days. If that can't be done, then Obama would have the authority to launch military strikes, congressional aides said, speaking on condition of anonymity because they weren't authorized to publicly discuss the reworked resolution.
The senators working on the proposal are Republicans John McCain, Kelly Ayotte, Lindsey Graham and Saxby Chambliss along with Democrats Chris Coons, Bob Casey, Chuck Schumer, Carl Levin and Bob Menendez.
The prospects for a diplomatic breakthrough unfolded rapidly as Assad's government accepted a Russia-advanced plan to turn over its chemical weapons stockpile, and France pitched a U.N. Security Council resolution to verify the disarmament. Syrian Foreign Minister Walid al-Moallem said after meeting with the Russian parliament speaker that his government quickly agreed to the Russian initiative to "thwart U.S. aggression."
France, a permanent member of the 15-nation Security Council, will start the process at the United Nations on Tuesday under Chapter 7 of the U.N. Charter, which is militarily enforceable. Russia, Assad's biggest international backer, championed the path forward in the hope of preventing the instability that might arise from a broader, Iraq-like conflict involving the United States.
Secretary of State John Kerry told the House Armed Services Committee that the Obama administration would give any proposal a hard look, but that it must not be used as a delaying tactic and that it has to be verifiable, real and include tangible conditions for Assad to forfeit his chemical weapons.
For the Obama administration, presenting just the possibility of a diplomatic solution offered an "out" as it struggled to find the 60 votes needed for Senate passage of a use-of-force resolution. Reflecting the difficulty, Senate Majority Leader Harry Reid, D-Nev., unexpectedly postponed a test vote originally set for Wednesday on Obama's call for legislation explicitly backing a military strike. Reid cited ongoing "international discussions."
Several lawmakers, conflicted by their desire to see Assad punished and their wariness about America getting pulled into another Middle East war, breathed sighs of relief.
Rep. Michael McCaul, R-Texas, said he was more open to the U.N. talks than Obama's plan for military action.
"I always thought an international coalition to secure and destroy the chemical weapons is a far better option than military intervention," McCaul said. He called for an "American plan" to do accomplish these tasks.
But there was plenty of skepticism about the latest diplomatic initiative, too.