Chad's constitution provides for a strong executive branch headed by a president who dominates the political system. The president has the power to appoint the prime minister and the cabinet, and exercises considerable influence over appointments of judges, generals, provincial officials and heads of Chad's para-statal firms. In cases of grave and immediate threat, the president, in consultation with the National Assembly, may declare a state of emergency. The president is directly elected by popular vote for a five-year term; in 2005 constitutional term limits were removed, allowing a president to remain in power beyond the previous two-term limit. Most of Déby's key advisers are members of the Zaghawa ethnic group, although southern and opposition personalities are represented in government.