The distribution of power between the president and the prime minister can vary greatly between countries. In
France, for example, in the case of cohabitation, the president oversees
foreign policy and
defence policy (these are generally called
les prérogatives présidentielles, presidential prerogatives) and the prime minister is in charge of
domestic policy and
economic policy. In this case, the division of responsibilities between the
prime minister and the
president is not explicitly stated in the constitution, but has evolved as a
political convention based on the constitutional principle that the prime minister is appointed (with the subsequent approval of a parliament majority) and dismissed by the president. On the other hand, whenever the president and the prime minister represent the same political party, which leads the cabinet, they tend to exercise
de facto control over all fields of policy via the prime minister. However, it is up to the president to decide how much autonomy is left to said prime minister. In most cases, cohabitation results from a system in which the two executives are not elected at the same time or for the same term. For example, in 1981, France elected both a
Socialist president and legislature, which yielded a Socialist premier. But while the president's term of office was for seven years, the
National Assembly only served for five. When, in the
1986 legislative election, the French people elected a right-of-centre assembly, Socialist president
François Mitterrand was forced into cohabitation with right-wing premier
Jacques Chirac. However, in 2000, amendments to the
French constitution reduced the length of the French president's term to five years. This has significantly lowered the chances of cohabitation occurring, as parliamentary and presidential elections may now be conducted within a shorter span of each other. == Advantages and disadvantages ==