Johnny DuPree, a Democrat who served as the mayor of Hattiesburg, Mississippi, for 16 years, has won a Republican-held Mississippi Senate seat, helping break the Republican Party's supermajority for the first time in 13 years. With 92% of the vote in as of 9 p.m. Tuesday, DuPree led Republican Anna Rush in the special election for Mississippi Senate District 45 by a 71%-29% margin, WDAM reported. The district includes parts of Forrest and Lamar counties.