In 2009, President Tandja Mamadou decided to organize a constitutional referendum seeking to extend his presidency claiming to respond to the desire of the people of Niger. Despite opposition from opposition political parties and against the decision of the Constitutional Court which ruled earlier that the referendum would be unconstitutional, President Tandja Mamadou modified and adopted a new constitution by referendum. It was declared illegal by the Constitutional Court but the President dissolved the Court and assumed emergency powers. The opposition boycotted the referendum and the new constitution was adopted with 92.5% of voters and a 68% turnout, according to official results. The adoption of the new constitution created a Sixth Republic, with a presidential system, as well as the suspension of the 1999 Constitution and a three-year interim government with Tandja Mamadou as president. Political and social unrest spiraled before, during and after the referendum project and ultimately led to a military coup in 2010 that ended the brief existence of the 6th Republic.

In a February 2010 coup d'état, a military junta led by captain Salou Djibo was established in response to Tandja's attempted extension of his political term by modifying the constitution. The Supreme Council for the Restoration of Democracy led by General Salou Djibo carried out a one-year transition plan, drafted a new constitution and held elections in 2011 that were judged internationally as free and fair.

ఐదవ రిపబ్లికు 1999–2009
ఆరవ రిపబ్లికు, నాలుగవ సైనిక పాలన 2009–2010
మొదటి సైనిక పాలన 1974–1991
మాలి సాంరాజ్యం