Chamisa turns up heat on ED. . . as he asks Khama, Geingob to mediate in Zim crisis Staff Writer 5 years ago © IT HAS emerged that opposition leader Nelson Chamisa has approached Namibian President Hage Geingob and former Botswana leader Ian Khama in... To access this post, you must purchase a subscription. Please click the button below to visit our subscriptions page to select a package. Subscriptions