2015 Nigerian general election north-eastern states. The government closed its land and sea borders from midnight on 25 March until the end of the polling date. The election was extended to 29 March due to delays and technical problems with the biometric card readers. It was the most expensive election ever to be held on the African continent. Nigeria is the continent's most populous country, has its largest economy and is its leading oil producer. Opposition candidate Muhammadu Buhari won the presidential election by more than 2.5 million votes. Incumbent President Goodluck Jonathan conceded defeat on 31 March, before the results from all 36
Goodluck Jonathan court of 13 terrorism-related charges and sentenced to 24 years in jail. In January 2015, Jonathan stated that, due to his refusal to award MEND a higher share of the oil wealth, Okah bombed Abuja with the purpose of assassinating Jonathan. Jonathan's government has largely been described as corrupt. According to "The Economist", corruption flourished under the Jonathan administration, "who let politicians and their cronies fill their pockets with impunity." Large sums of money have been used improperly multiple times, with ₦ 3.98 trillion Naira ($20 billion USD) allegedly going missing and ₦ 398 billion Naira ($2 billion USD) of