South Africa's Zuma bids to win back ANC support in Mandela Bay

By Mfuneko Toyana PORT ELIZABETH, South Africa (Reuters) - South African President Jacob Zuma, facing calls to resign from within his African National Congress, will seek to win back support with the launch on Saturday of the party's manifesto in Port Elizabeth, where it risks losing an important poll. Losing power in Nelson Mandela Bay municipality, a stronghold of the ANC's fight against apartheid and named after its liberation hero, would be a symbolic blow for Zuma and his party nationally.