The United States Labor Party is a progressivepolitical party advocating workers' interests. Membership is around 5000.
Formed in 1995 by the United Mine Workers, the Longshoremen, American Federation of Government Employees, California Nurses Association and hundreds of other labor unions. This organization allied itself with the Green Party of Wyoming in 1998 to field its first candidates for local and federal offices. It has not run candidates since (and never any outside of Wyoming), and the future of the party remains uncertain, particularly after the death of Tony Mazzocchi, the founding national organizer. All of the founding unions continue to actively support Democratic Party candidates.
The Socialist LaborParty of America (SLP) is the oldest socialist political party in the United States and the second oldest socialist party in the world.
The party was founded in Newark, New Jersey, in 1876 as the Workingmen's Party of America.
The SLP is the second oldest of the so-called "third parties" (the Prohibition Party being the oldest).