But Zanu-PF retains control of the military, police, central bank and other organs of state, and the party clearly intends to do everything it can to stay in authority despite its plummeting public support.Even while Mr Mugabe's position remains sacrosanct, the instinct for self-preservation is motivating members to look beyond him.Succession was taboo, said Tendai Wenyika, the Zanu-PF youth sec