Although Nigerian President Olusegun Obasanjo described last weekend’s national assembly ballot as “rig free” and "very successful", his competitors are crying foul. Obasanjo’s leading presidential challenger, former military head of state and retired army general, Muhammadu Buhari, told a news conference on Wednesday: "What happened on Saturday April 12, in many parts of the country, fell short of the minimum requirements for a free, fair, credible and transparent election."