Saturday’s election, which U.S. observers said had lost some credibility after being abruptly delayed by a week by officials citing organizational glitches, was expected to be Nigeria’s tightest since the end of military rule two decades ago. Northeast Nigeria has also been wracked a decade-long battle with Islamist militants has spilled into neighboring countries and led to the deployment of a regional task force. Buhari, 76, is a former military ruler seeking a second term on an anti-corruption platform, while Atiku, 72, a businessman and ex-vice president, has pledged above all to expand the role of the private sector.
