 The runoff sometimes includes two candidates of the same party, a phenomenon which frequently occurs.Historically, the Democratic Party was dominant in Louisiana from the late 19th through much of the 20th century, especially after the state legislature disenfranchised most blacks at the turn of the 20th century, weakening the Republican Party.The only party labels originally permitted under the Louisiana law were Democrat, Republican, and No Party; however, , candidates may take the identity of any "registered political party".