harare zimbabwe army appear push quick bloodless end 93-year-old president robert mugabe 37 years power replace national unity government head former deputy emmerson mnangagwa accord political source harare mugabe house arrest lavish harare home resist pressure stand voluntarily nl8n1nm1n9 assume follow likely key players expect settlement accord political source zimbabwe south africa several years zimbabwean intelligence document see reuters emmerson mnangagwa likely president lifelong mugabe aide 1970s liberation war veteran know crocodile mnangagwa 75 pole position succeed mugabe progress impede dramatic political ascent mugabe wife grace sack vice-president month clear path grace presidency appear trigger army step advance prefer successor morgan tsvangirai likely prime minister former union leader found movement democratic change late 1990s tsvangirai 65 mugabe main political rival two decades serve prime minister 2009-2013 unity government form violence-ridden elections 2008. tsvangirai undergo treatment cancer outside zimbabwe return harare late wednesday constantino chiwenga possible vice-president military chief pull trigger coup chiwenga expect win senior role interim administration chiwenga 61 serve arm force since zimbabwe independence 1980 sanction unite state european union although latter remove list restrict individuals 2014. joice mujuru possible vice-president liberation war veteran nom de guerre spill blood mujuru 62 form political party oust vice-president 2014. husband solomon mujuru general die suspicious circumstances 2011 regard one fear men zimbabwe one people capable challenge mugabe dumiso dabengwa possible vice-president moscow-trained dabengwa 77 nickname black russian fight 1970s anti-colonial struggle zipra zimbabwe people liberation army rival mugabe zanla zimbabwe african national liberation army incorporation unity government would ensure represent wing liberation struggle tendai biti possible finance minister lawyer train biti 51 international plaudits finance minister 2009-2013 government stabilize implode economy tell reuters would happy reprise role tsvangirai former political mentor board factbox likely players potential post-coup zimbabwe unity government