Just nowFarouk Chothia & Catherine Byaruhanga,BBC News, JohannesburgReutersCyril Ramaphosa replaced Jacob Zuma as president in 2018 after a bitter power struggleSouth Africa’s President Cyril Ramaphosa is under growing pressure after leading the ruling African National Congress (ANC) to its worst election result in 30 years, forcing it to share power.With almost all the votes in, the ANC is on 40% – down from 58% at the previous election.This is lower than the party’s feared worst-case scenario of 45%, analysts say.The ANC has always polled above 50% since the country’s first democratic…