Kammala jumla mai zuwa: Jam'iyyar Ma'aikata (WP) ƙungiya ce ta Trotskyist ta Camp na Uku a Amurka. An kafa shi ne a watan Afrilu na 1940 ta membobin Socialist Workers Party wadanda suka yi adawa da mulkin mallaka na kasar.
Soviet mamayewa na Finland da kuma Leon Trotsky ta imani da cewa USSR karkashin Joseph Stalin har yanzu innately proletarian, a "degenerated ma'aikata jihar". Sun hada da Max Shachtman, wanda ya zama sabon shugaban kungiyar, Hal Draper, CLR James, Raya Dunayevskaya, Martin Abern, Joseph Carter, Julius Jacobson, Phyllis Jacobson, Albert Glotzer, Stan Weir, BJ Widick, James Robertson, da Irving Howe. Sau da yawa ana kiran siyasar jam'iyyar "Shachtmanite".