HARARE – While First Lady Grace Mugabe and her husband’s two deputies Emmerson Mnangagwa and Phelekezela Mphoko together with Saviour Kasukuwere appear to be front-runners to succeed President Robert Mugabe, four dark horses have emerged — retired Reserve Bank of Zimbabwe governor Gideon Gono, army commander Constantine Chiwenga, Defence minister Sydney Sekeramayi and Higher Education…

