President Obama is weighing both diplomatic and military options on how best to respond to the use of chemical weapons in Syria as he prepares to address the nation at 9 p.m. tonight. Watch a live video stream here.

With Syria saying it supports a proposal that it give up control of its chemical weapons stockpiles, Obama joined a call for the U.N. Security Council to begin talks aimed at securing those weapons.

But at the same time, he's continuing to push the fallback idea of U.S. airstrikes against Bashar Assad's regime, in case that effort fails.

A bipartisan group of senators is seizing on that new strategy -- putting together a reworked congressional resolution calling for a U.N team to remove the chemical weapons by a set deadline. It authorizes military action if that doesn't happen.

Obama is discussing the diplomatic and military options today with Democratic and Republican senators who are growing increasingly wary of U.S. military intervention. And he's planning to address the American people from the White House tonight.

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