President George W. Bush, left, Barbara Bush, center, and former President George H.W. Bush, right, stand during a commencement ceremony at Texas A&M University on Friday, Dec. 12, 2008, in College Station, Texas. (AP Photo/Evan Vucci)
President George W. Bush, right, talks with his mother, former first lady Barbara Bush, left, during a commencement ceremony at Texas A&M University Friday, Dec. 12, 2008, in College Station, Texas. (AP Photo/David J. Phillip)
Former President George Bush, right, watches as his wife, Barbara gives the "W" sign for their son, President George W. Bush, while attending the Tennis Masters Cup tournament Tuesday, Nov. 16, 2004 in Houston. (AP Photo/David J. Phillip)
U.S. President Barack Obama, right, and former U.S. president George W. Bush walk to meet with family members of the U.S. embassy victims during a wreath laying ceremony to honor the victims of the U.S. Embassy bombing on Tuesday, July 2, 2013, in Dar Es Salaam, Tanzania. The president is traveling in Tanzania on the final leg of his three-country tour in Africa. (AP Photo/Evan Vucci)
George W. Bush, hipster favorite? This cheerful photo of the former president with his infant granddaughter helped Mr. Bush gain some new admiration among the under-30 crowd. (GEORGE W. BUSH)
All in a day's work: White House press secretary Jay Carney praises former President George W. Bush's paintings ("I think the results are pretty impressive") and wrangles with skeptical press over transparency issues. (Associated Press)