Labour federation Cosatu has repeated its calls for President Jacob Zuma to step down. The federation's secretary general Bheki Ntshalintshali reiterated the call during an event to mark the 23rd anniversary of the passing of Communist Party leader Joe Slovo in Soweto. He called on the ANC to pay special attention to the two centers of power that have been created following Cyril Ramaphosa's election as party president last month