Sam Marcy became a trot in the 1940s but then got sick of the wrecking that trots did and started the WWP in the late 50s. I honestly can't tell you the functional difference between marcyites and MLs. It probably made sense during the cold war because they were basically tankies that weren't controlled by Moscow (CPUSA got subsidized by the USSR) but I'm sure there is some obscure difference.
Sam Marcy became a trot in the 1940s but then got sick of the wrecking that trots did and started the WWP in the late 50s. I honestly can't tell you the functional difference between marcyites and MLs. It probably made sense during the cold war because they were basically tankies that weren't controlled by Moscow (CPUSA got subsidized by the USSR) but I'm sure there is some obscure difference.