Cika wannan jumla: A ranar 20 ga Janairu, 2007, bayan hambarar da Shugaba Maaouya Ould Sid'Ahmed Taya a cikin
Agusta 2005 soja " juyin mulki ", Boulkheir ya sanar da takararsa a zaben shugaban kasa na Maris 2007. A zaben, wanda aka gudanar a ranar 11 ga Maris, ya kasance na huɗu, yana samun kashi 9.79% na kuri'un. A ranar 19 ga Maris, ya goyi bayan Sidi Ould Cheikh Abdallahi a zagaye na biyu, duk da cewa ya kasance wani ɓangare na Coalition of Forces for Democratic Change tare da sauran 'yan takarar zagaye na biyu, Ahmed Ould Daddah. Abdallahi ya lashe zaben, kuma a ranar 26 ga Afrilu, 2007, an zabi Boulkheir a matsayin Shugaban Majalisar Dokoki ta Kasa, inda ya karbi kuri'u 91 daga wakilai 93 da ke wurin.