man , ▁A bern ▁was ▁exp elled ▁from ▁the ▁Work ers ▁( Comm un ist ) ▁Party ▁in ▁ 1 9 2 8 ▁for ▁supporting ▁Leon ▁T rot sky . ▁He ▁was ▁a ▁found ing ▁member ▁of ▁the ▁Commun ist ▁League ▁of ▁America ▁( CLA ) ▁in ▁May ▁ 1 9 2 8 ▁and ▁sat ▁on ▁the ▁gover ning ▁National ▁Committee ▁of ▁that ▁organization ▁from ▁ 1 9 3 1 ▁to ▁ 1 9 3 4 . ▁In ▁this ▁interval ▁Sh acht man ▁and ▁C annon ▁were ▁increasing ly ▁at ▁odd s ▁with ▁one ▁another , ▁with ▁A bern ▁t ending ▁to ▁follow ▁Sh acht man ▁in ▁matters ▁of ▁controvers y . ▁ ▁A bern ▁was ▁also ▁a ▁found ing ▁member ▁of ▁Work ers ▁Party ▁of ▁the ▁United ▁States ▁in ▁ 1 9 3 4 , ▁formed ▁when ▁the ▁C LA ▁merged ▁with ▁A . J . ▁Must e ' s ▁Work ers ▁Party . ▁He ▁was ▁a ▁member ▁of ▁the ▁National ▁Committee ▁of ▁that ▁organization ▁from ▁ 1 9 3 4 ▁to ▁ 1 9 3 6 . ▁In ▁that ▁year ▁he ▁and ▁other ▁T rot sky ists ▁entered ▁the ▁Social ist ▁Party ▁en ▁mas se ▁ ▁as ▁part ▁of ▁the ▁so - called ▁" F rench ▁Turn " ▁t actic , ▁a ▁brief ▁inter l ude ▁ending ▁with ▁their ▁exp ulsion ▁late ▁in ▁ 1 9 3 7 . ▁ ▁In ▁ 1 9 3 8 , ▁A bern ▁helped ▁found ▁the ▁Social ist ▁Work ers ▁Party ▁( SW P )