Complex sentence: In each case radicals, either associated with the CPUSA or other leftwing parties, played key leadership roles; the CP and its allies, such as Harry Bridges, played an important role in the west coast longshore strike.
Split into simpler sentences: In each case radicals, either associated with the CPUSA or other leftwing parties, played key leadership roles. The CP and its allies, such as Harry Bridges, played an important role in the west coast longshore strike.