Complex sentence: In 1970--1973, these strategic differences had become so acute that the Socialist Party changed its name to Social Democrats, USA and leaders of two of its caucuses formed separate socialist organizations, the Democratic Socialist Organizing Committee and the Socialist Party USA.
Split into simpler sentences: In 1970--1973, these strategic differences had become so acute that the Socialist Party changed its name to Social Democrats, USA. Leaders of two of its caucuses formed separate socialist organizations, the Democratic Socialist Organizing Committee and the Socialist Party USA.