DAMASCUS  - Syria’s opposition was in disarray Wednesday, struggling to present a united front in the face of a protest crackdown whose death toll rose again despite the presence of Arab League monitors. Western powers have repeatedly called on the Syrian opposition to put aside differences and join forces in their bid to oust President Bashar al-Assad and his autocratic regime after more than nine months of bloody violence. Stepping up its involvement, the United States sent Jeffrey Feltman, the assistant secretary of state for Near East Affairs, to Cairo late on Tuesday for consultations with the Arab League about Syria.