Syrian Rebel Political Leadership Collapsing

President resigns, rebel prime minister rejected by the Free Syrian Army

 Syria's opposition coalition was on the verge of collapse Sunday after its president resigned and rebel fighters rejected its choice to head an interim government, leaving a U.S.-backed effort to forge a united front against President Bashar al-Assad in tatters.

The resignation of Moaz al-Khatib, a moderate Sunni preacher who heads the Syrian Opposition Coalition, climaxed a bitter internal fight over a range of issues, from the appointment of an interim government to a proposal by Khatib to launch negotiations with the Syrian regime.