About
Mamadou Tandja was a Nigerien politician who served as the President of Niger from 1999 to 2010. He was a prominent figure in Nigerien politics, having served as the President of the National Movement for the Development of Society (MNSD) from 1991 to 1999. Tandja unsuccessfully ran for president twice before securing his first term in 1999. During his time as President of Niger, he also held the position of Chairman of the Economic Community of West African States from 2005 to 2007.
Career Timeline
MNSD Party President
Tandja becomes President of the National Movement for the Development of Society (MNSD), a major political force in Niger.
Elected President of Niger
After unsuccessful attempts, Tandja wins the presidential election, marking a high point in his career.
ECOWAS Chairman
Tandja assumes the chairmanship of the Economic Community of West African States, increasing his regional influence.
Constitutional Crisis Begins
Tandja's attempts to extend his presidential term beyond constitutional limits trigger a major political crisis.
Overthrown in Military Coup
Tandja is ousted from power in a military coup, ending his presidency and significantly diminishing his influence.
Legacy: Controversial Figure
Remembered for both his leadership and the controversial end to his presidency, Tandja's legacy is mixed.
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Last updated: February 25, 2026