The 2009–2010 Nigerien constitutional crisis occurred in Niger due to a political conflict between President Mamadou Tandja and judicial and legislative bodies regarding the Constitutional referendum that opponents claimed was an attempt to extend his mandate beyond the constitutional maximum. It was held on 4 August 2009 before a parliamentary election which was mandated to take place by 26 August 2009. The crisis eventually led to a coup d'état by military leaders who overthrew President Tandja and formed a ruling junta.