Tuhia he tomokanga mō tēnei whārangi - I kaha te pānga o te Raru Nui ki te rohe o San Francisco Bay i nga tau 1930, i ahu ki ngā taumata tiketike o te kore mahi, me te whakakorenga o te raupapa tōrangapū. I kaha a Warren ki te mahi mahi i roto i te hanganga ki te San Francisco General Strike
He aha? I roto i te "Whitney v. California" (1927) I whakawakia e Warren tetahi wahine i raro i te Ture o te California Criminal Syndicalism Act mo te haere ki tetahi hui komihana i Oakland. I te tau 1936, i anga a Warren ki tetahi o nga keehi tino tautohetohe o tana umanga i muri i te kitenga o George W. Alberts, te miihini matua o te kaipuke utanga, kua mate. I whakapono a Warren i kohurutia a Alberts i roto i tetahi whakapae i whakahaeretia e nga mema o te uniana maui-maui, ana i riro i a ia te whakapae o nga rangatira o te uniana George Wallace, Earl King, Ernest Ramsay, me Frank Conner. He maha nga mema o te uniana i tohe ko nga kaiwhakapae kua whakauruhia e te tari o Warren, a ka whakahaerehia e ratou nga whakahe o te whakawakanga.