Nigeria , Africa 's most populous country and its largest oil producer , is a major supplier of crude oil to the United States , and hosts many Western oil companies and workers . The voting was largely peaceful . President Paul Jonathan is the front - runner . His victory comes despite a poor showing in the parliamentary vote last year . His main challenger is former military ruler Prince Mohammed .
The voting was largely peaceful . President Paul Jonathan is the front - runner . His victory comes despite a poor showing in the parliamentary vote last year . His main challenger is former military ruler Prince Mohammed .