NEW ORLEANS — C. Ray Nagin, the former mayor of New Orleans who was convicted in February on corruption charges, was sentenced to 10 years in prison on Wednesday in federal court in New Orleans. Mr. Nagin was found guilty in February on 20 counts, most relating to kickbacks from contractors looking for city work. The sentence was imposed by Judge Ginger Berrigan of United States District Court for the Eastern District of Louisiana. Mr. Nagin, a Democrat, was arrested in January 2013, nearly three years after he left office. He was charged with taking kickbacks in the form of...