محمد ولد عبد العزيز
Ba Mamadou dit Mbaré (1946 – 10 January 2013) was a Mauritanian politician who served as President of the Senate of Mauritania from 2006 until his death. As President of the Senate, he succeeded Mohamed Ould Abdel Aziz as Head of State on 15 April 2009, when Abdel Aziz resigned to take part in the June 2009 presidential election. Abdel Aziz was then elected President and in turn succeeded Mbaré on 5 August 2009.