the nation's armed forces, though once again this can range from a ceremonial role to one with considerable authority. Presidential systems In almost all states with a presidential system of government, the president exercises the functions of head of state and head of government, i.e. the president directs the executive branch of government. When a president is not only head of state, but also head of government, this is known in Europe as a President of the Council (from the French Président du Conseil), used 1871–1940 and 1944–1958 in the Third and Fourth French Republics. In the United States the president has always been both Head of State and Head of Government and has always had the title of President. Presidents in this system are either directly elected by popular vote or indirectly elected by an electoral college or some other democratically elected body. In the United States, the president is indirectly elected by the Electoral College made up of electors chosen by voters in the presidential election. In most states of the United States, each elector is committed to voting for a specified candidate determined by the popular vote in each state, so that the people, in voting for each elector, are in effect voting for the candidate. However, for various reasons the numbers of electors in favour of each candidate are unlikely to be proportional to the popular vote. Thus, in five close United States elections (1824, 1876, 1888, 2000, and 2016), the candidate with the most popular votes still lost the election. In Mexico, the president is directly elected for a six-year term by popular vote. The candidate who wins the most votes is elected president even without an absolute majority. The president is allowed to serve only one term. In Brazil, the president is directly elected for a four-year term by popular vote. A candidate has to have more than 50% of the valid votes. If no candidates achieve a majority of the votes, there is a runoff election between the two candidates with most votes. Again, a candidate needs a majority of the vote to be elected. In Brazil, a president cannot be elected to more than two consecutive terms, but there is no limit on the number of terms a president can serve. Many South American, Central American, African and some Asian nations follow the presidential model. Semi-presidential systems A second system is the