** FILE ** Former Rep. Artur Davis, who served as a Democrat during his four terms in office and seconded Barack Obama's nomination at the 2008 convention, now supports Mitt Romney and will speak in Tampa, Fla., at the Republican National Convention. (Associated Press)

** FILE ** Former Rep. Artur Davis, who served as a Democrat during his four terms in office and seconded Barack Obama's nomination at the 2008 convention, now supports Mitt Romney and will speak in Tampa, Fla., at the Republican National Convention. (Associated Press)