Michael Charles Chilufya Sata (6 July 1937 – 28 October 2014) was a Zambian politician who was the fifth President of Zambia, from 23 September 2011 until his death on 28 October 2014. A social democrat, he led the Patriotic Front (PF), a major political party in Zambia. Under President Frederick Chiluba, Sata was a minister during the 1990s as part of the Movement for Multiparty Democracy (MMD) government; he went into opposition in 2001, forming the PF. As an opposition leader, Sata – popularly known as "King Cobra" – emerged as the leading opposition presidential contender and rival to President Levy Mwanawasa in the 2006 presidential election, but was defeated. Following Mwanawasa's death, Sata ran again and lost to President Rupiah Banda in 2008.