NEW : President Obama congratulates Morsi , vows to `` stand by the Egyptian people '' Mohamed Morsi beats former Mubarak PM Ahmed Shafik 52 % to 48 % , officials say . The White House said it was not aware of any decision on whether to send more troops or arms to Egypt. His win triggers raucous celebrations , and some concern , in Cairo and beyond .
NEW : President Obama congratulates Morsi , vows to `` stand by the Egyptian people '' Mohamed Morsi beats former Mubarak PM Ahmed Shafik 52 % to 48 % , officials say . The Muslim Brotherhood 's Morsi promises he 'll represent all Egyptians . His win triggers raucous celebrations , and some concern , in Cairo and beyond .