The politics of Zimbabwe takes place in a framework of a full presidential republic, whereby the President is the head of state and government as organized by the 2013 Constitution. Executive power is exercised by the government. Legislative power is vested in both the government and parliament.
The Zimbabwean Constitution, initially from the Lancaster House Agreement a few months before the 1980 elections, chaired by Lord Carrington, institutionalizes majority rule and protection of minority rights. Since independence, the Constitution has been amended by the government to provide for:
The elected government controls senior appointments in the public service, including the military and police, and ensures that appointments at lower levels are made on an equitable basis by the independent Public Service Commission.
ZANU-PF leader Robert Mugabe, elected prime minister in 1980, revised the constitution in 1987 to make himself president. President Mugabe's affiliated party won every election from independence on April 18, 1980, until it lost the parliamentary elections in March 2008 to the Movement for Democratic Change. In some quarters corruption and rigging elections have been alleged. In particular the elections of 1990 were nationally and internationally condemned as being rigged, with the second-placed party, Edgar Tekere's Zimbabwe Unity Movement, winning only 20% of the vote. Presidential elections were held in 2002 amid allegations of vote-rigging, intimidation, and fraud, and again in March 2008.