Michael Chilufya Sata (born 1937 is a Zambian politician who has been the President of Zambia since 23 September 2011. He leads 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.