From right to left, Senate Foreign Relations Chairman Robert Menendez, D-N.J., Sen. Bob Corker, R-Tenn., the ranking member, Sen. James Risch, R-Idaho, and Sen. Marco Rubio, R-Fla., listen to testimony from Secretary of State John Kerry, and Defense Secretary Chuck Hagel at a hearing on President Obama's request for congressional authorization for military intervention in Syria, a response to last month's alleged sarin gas attack in the Syrian civil war, on Capitol Hill in Washington, Tuesday, Sept. 3, 2013. (AP Photo/J. Scott Applewhite)

From right to left, Senate Foreign Relations Chairman Robert Menendez, D-N.J., Sen. Bob Corker, R-Tenn., the ranking member, Sen. James Risch, R-Idaho, and Sen. Marco Rubio, R-Fla., listen to testimony from Secretary of State John Kerry, and Defense Secretary Chuck Hagel at a hearing on President Obama's request for congressional authorization for military intervention in Syria, a response to last month's alleged sarin gas attack in the Syrian civil war, on Capitol Hill in Washington, Tuesday, Sept. 3, 2013. (AP Photo/J. Scott Applewhite)