After independence, Mnangagwa held a series of senior cabinet positions under Mugabe. From 1980 to 1988, he was the country's first Minister of State Security, and oversaw the Central Intelligence Organisation. His role in the "Gukurahundi" massacres, in which thousands of Ndebele civilians were killed during his tenure, is controversial. Mnangagwa was Minister of Justice, Legal and Parliamentary Affairs from 1989 to 2000 and then Speaker of the Parliament from 2000 until 2005, when he was demoted to Minister of Rural Housing for openly jockeying to succeed the aging Mugabe. He returned to favour during the 2008 general election, in which he ran Mugabe's campaign, orchestrating political violence against the opposition Movement for Democratic Change – Tsvangirai. Mnangagwa served as Minister of Defence from 2009 until 2013, when he became justice minister again. He was also appointed First Vice-President in 2014 and was widely considered a leading candidate to succeed Mugabe.