[2][3] After Taya's ouster in August 2005, Boulkheir stood as the APP candidate again in the March 2007 presidential election.
[1] In this election, held on March 11, he placed fourth, receiving 9.79% of the vote;[4] he subsequently backed Sidi Ould Cheikh Abdallahi for the second round,[5] despite the participation of the APP in the Coalition of the Forces for Democratic Change along with the other second round candidate, Ahmed Ould Daddah.
[9] In the 21 January and 4 February 2007 Senate election, the APP won only one out of 56 seats.
On September 2, 2007, Boulkheir said that the APP would not join a new party being formed to support Abdallahi.
[10] Following the August 2008 military coup d'état, the APP, along with the pro-Abdallahi National Pact for Democracy and Development (PNDD-ADIL), joined the four-party National Front for the Defense of Democracy, which opposed the coup.