The governments of Iceland have always been coalition governments, with two or more parties involved, as no single political party has ever received a majority of seats in the Althing throughout the republican period. The extent of the political power possessed by the office of the president is disputed by legal scholars, in Iceland; several provisions of the constitution appear to give the president some important powers, but other provisions and traditions suggest differently. In 1980, Icelanders elected Vigdís Finnbogadóttir as president, the world's first directly elected female head of state. She retired from office in 1996. In 2009, Iceland became the first country with an openly gay head of government when Jóhanna Sigurðardóttir became prime minister.