"The CLS took a harsh rhetorical stance towards the other three Communist organizations that existed at the time of its formation — the official Communist Party USA, Cannon's Communist League of America (Opposition), and Jay Lovestone's Communist Party (Majority Group), declaring that "it considers the other three groups as 'right-wing' opportunist groups, each differing in form and manner, but each overestimating the enemy and underestimating the proletariat.