The only Democrat in Louisiana's House delegation, Cedric Richmond, has been successful in his bid for re-election to a third term.
Richmond faced two other Democrats, Rufus Johnson and Gary Landrieu, along with Libertarian Samuel Davenport and independent David Brooks in Tuesday's election.
Richmond, who is the only African-American in the state's congressional delegation, first won the 2nd District seat in 2010, when, the district tied together predominantly black areas of New Orleans and neighboring Jefferson Parish.
When lawmakers redrew district lines to account for population shifts after the 2010 census, the district remained mostly black and Democratic, but it now stretches northwest along the Mississippi River into the Baton Rouge area.