The politics of Luxembourg takes place in a framework of a parliamentary representative democratic monarchy, whereby the Prime Minister of Luxembourg is the head of government, and of a multi-party system. Executive power is under the constitution of 1868, as amended, exercised by the government, by the Grand Duke and the Council of Government (cabinet), which consists of a prime minister and several other ministers. Usually the prime minister is the leader of the political party or coalition of parties having the most seats in parliament. Legislative power is vested in both the government and parliament. The judiciary is independent of the executive and the legislature.
Legislative power is vested in the Chamber of Deputies, elected directly to five-year terms.
Since the end of World War II, the Christian Social People's Party (CSV) has been the senior partner in all governing coalitions with two exceptions: 1974-79 (DP-LSAP coalition) and since 2013 (DP-LSAP-Green coalition). The Catholic-oriented CSV resembles Christian democratic political parties in other West European nations, and enjoys broad popular support making it the strongest party in the country and the second strongest in those regions where it is not the "number one".
The Luxembourg Socialist Workers' Party (LSAP) is a party of social-democratic orientation which has been a junior partner in most governments since 1974 either with the CSV in 1984–1999 and 2004-2013, or the Democratic Party in 1974-1979. Its stronghold lies in the industrial belt in the south of the country (the Minette Region, which is mainly the canton of Esch).