The following articles include polemics against the International Socialist Organization and the International Socialist Tendency. They show the difference between the working-class Trotskyist politics of the LRP and the middle-class opportunism of the ISO:
Women and the Family: The Ties That Bind
Moratorium Debate in Illinois: Abolish Capitalism's Racist Death Penalty
ISO vs. SWP: Who's More Opportunist?
Dossier on June 2000 Incident of ISO's Sectarian Thuggery Against the LRP
Open Letter From Three Former ISO Members