The presidential candidates, challenger Muhammadu Buhari and incumbent Goodluck Jonathan, were in a dead heat before the election Saturday.
Abdel Fattah al-Sisi says it is crucial to tackle extremist ideologues across the region.
Somali security forces battled with Islamist militants from Friday to Saturday, eventually breaking the siege, but not before many people were killed.
The former Alaska governor made the plea in a Facebook post, and critics have called the idea unconstitutional.
The rebels, who have been denounced by several leaders, have taken control over the country's capital Sanaa and the government.
Despite concerns the U.S. or the U.K. would block the move, the two accepted the resolution, and it was passed by consensus.
Like the U.K., Switzerland and other European countries, Russia has announced it intends to join the bank.