When the RPR/UDF right-wing coalition won a slight majority in the National Assembly in the 1986 election, Mitterrand (PS) appointed Chirac prime minister (though many in Mitterrand's inner circle lobbied him to choose Jacques Chaban-Delmas instead). This unprecedented power-sharing arrangement, known as cohabitation, gave Chirac the lead in domestic affairs. However, it is generally conceded that Mitterrand used the areas granted to the President of the Republic, or "reserved domains" of the Presidency, Defence and Foreign Affairs, to belittle his Prime Minister.