In this Aug. 8, 2008, file photo, President George W. Bush is met by Deuce McAllister, left, and Drew Brees of the New Orleans Saints football team as he arrives at Louis Armstrong New Orleans International Airport on the way to events marking the third anniversary of Hurricane Katrina, in Kenner, La. (AP Photo/J. Scott Applewhite, File)
George W. Bush's Scottish terrier, Barney, was the White House pet dog for eight years. He used to chase golf balls on the green at Camp David and guard the South Lawn to the White House like a Secret Service agent, according to a statement Bush gave on Barney's passing in 2013.
Former Presidents George H.W. Bush and George W. Bush with Jeb Bush. One analyst said that link may be one of the reasons that two-thirds of Republicans describe Jeb Bush as qualified for the presidency.
Image #: 2625014 Former President George H.W. Bush, U.S. President George W. Bush, and Governor Jeb Bush, leave together after the christening ceremony of the USS George H.W. Bush at Northrop-Grumman's shipyard in Newport News, Virginia October 7, 2006. The Navy's Nimitz-class aircraft carrier is scheduled to enter service in late 2008. REUTERS/Kevin Lamarque /Landov
Former Florida Gov. Jeb Bush said that under his brother, former President George W. Bush, the federal government spent far too much. However, he also defended the NSA's controversial phone-snooping program as a crucial intelligence-gathering tool. (Associated Press)
Former President George W. Bush joined roughly 20 wounded veterans on Thursday for a 100-kilometer, three-day bike ride as part of the Bush Institute's Military Service Initiative. (The Bush Institute)
Sean Penn sarcastically thanked former President George W. Bush and former Vice President Dick Cheney Wednesday night for supposedly "inventing" the Islamic State terror group that is wreaking havoc across the Middle East. (TBS/Conan)
Former first lady Laura Bush, left, first lady Michelle Obama, President Barack Obama, Rep. John Lewis, D-Ga., former President George W. Bush, and Rep. Terri Sewell, D-Ala., hold hands during a prayer after the president's speech by the Edmund Pettus Bridge in Selma, Ala., on the 50th anniversary of “Bloody Sunday," a landmark event of the civil rights movement, Saturday, March 7, 2015. (AP Photo/Jacquelyn Martin)
John Walters, the drug czar under President George W. Bush, said "we see now what happens when people walk away [from fighting drugs] at the national level — it destroys the foundation of all the work we did." Among his suggestions was random drug testing in schools. (Associated Press)
Then-Air Force Gen. Michael Hayden speaks in the Oval Office at the White House in Washington after President Bush announced he was his choice to replace outgoing CIA Director Porter Goss. The head of the CIA during President George W. Bush’s second term says “I didn’t lie” to Congress about harsh interrogations of terrorism suspects. Retired Gen. Michael Hayden does say the intelligence community labored after Sept. 11, 2001 to repel further attacks against the U.S. (AP Photo/Ron Edmonds, File)
George W. Bush talks about renewing 1996 welfare reform with, from left: HHS Secretary Tommy Thompson, community development leader Robert L. Woodson, Sr., Pastor Shirley Holloway. (AP Photo/J.Scott Applewhite)
FILE - In this Aug. 10, 2004 file photo, President George W. Bush, left, is introduced by his brother Florida Gov. Jeb Bush, right, at 'Ask President Bush' campaign rally, at Okaloosa-Walton Community College Gymnasium in Niceville, Fla. President George W. Bush is giving even odds to an attempt at a family legacy as part of the 2016 White House campaign, saying Sunday Nov. 9, 2014 on “Face the Nation” on CBS his brother Jeb Bush is “wrestling with the decision.” (AP Photo/Pablo Martinez Monsivais, File)
Former President George W. Bush passes by a portrait of himself and his father former President George H.W. Bush as he takes the stage to discuss his new book, "41: A Portrait of My Father" at the his father's presidential library Tuesday, Nov. 11, 2014, in College Station, Texas. (Associated Press) ** FILE **