On August 10, Damon J. Baldone filed a lawsuit in state court, to force local election officials to accept his voter registration card that shows he is a Republican and a Democrat. Baldone is an attorney and is representing himself. The case is Baldone v Terrebonne Parish Registrar of Voters, 32nd judicial district court 175157.
Baldone hopes to run for the legislature again this year. If he were permitted to register into both parties, then he would be on the ballot as “Democrat, Republican.” The election is October 2015. Here is his Petition for a Writ of Mandamus.
Whether an individual can be a member of two political parties is an interesting philosophical question which has been very little litigated or discussed. It is somewhat similar to the question of whether an individual can be a member of two different churches.