HAMZA IBRAHIM NIGERIA'S presidential election was marked by long delays at some polling stations, which did not deter large crowds of voters hoping for a reset after years of worsening violence and hardship under outgoing President Muhammadu Buhari. Africa's most populous nation is struggling with Islamist insurgencies in the northeast, an epidemic of kidnappings for ransom, the conflict between herders and farmers, shortages of cash, fuel and power, as well as deep-rooted corruption and poverty. Reuters reporters at locations across the country saw a mixed election day picture, with some polling stations closing at the planned time of 2:30 p.m.…