WASHINGTON - SEPTEMBER 17: Former President George H. W. Bush speaks after he was presented with the Spirit of Hope Award September 17, 2002 during the 2002 United Service Organizations (USO) Gala in Washington, DC. The award is given annually to individuals, organizations and corporations demonstrating their support for the USO and their commitment to enhancing the quality of life of service members and their families. Former President Bush was presented with the first Presidential Spirit of Hope award, which has previously been given only to Bob Hope and his family. (Photo by Alex Wong/Getty Images)

HOUSTON, TX - APRIL 21: Former president George W. Bush, left, wheels his father, former president George H.W. Bush into the church for the funeral for former first lady Barbara Bush at St. Martin's Episcopal Church on April 21, 2018 in Houston, Texas. Bush, wife of former president George H. W. Bush and mother of former president George W. Bush, died at her home in Houston on April 17 at the age of 92. (Photo by Brett Coomer - Pool/Getty Images)

NEW YORK - MAY 27: Barbara Bush and former President George H. W. Bush pose for photographers before the start of the 29th Annual T.J. Martell Foundation Awards Gala at the New York Hilton May 27, 2004 in New York City. (Photo by Paul Hawthorne/Getty Images)

CINCINNATI - MARCH 31: Former President George Herbert Walker Bush speaks to the crowd after throwing the ceremonial first pitch prior to the opening day game between the Pittsburgh Pirates and the Cincinnati Reds at Great American Ball Park on March 31, 2003 in Cincinnati, Ohio. The Pirates defeated the Reds 10-1. (Photo by Jonathan Daniel/Getty Images)

13 Sep 1996: Former US President George Bush (left) and U.S. Team captain Arnold Palmer (right) shield their eyes from the sun as they watch the morning fourball matches of the 1996 Presidents Cup at Robert Trent Jones Golf Club in Manassas, Virginia.

HOUSTON, TX - OCTOBER 11: Former President George H.W. Bush throws out the ceremonial first pitch to Jed Lowrie #8 of the Houston Astros as former First Lady Barbara Bush looks on prior to game three of the American League Division Series between the Houston Astros and the Kansas City Royals at Minute Maid Park on October 11, 2015 in Houston, Texas. (Photo by Bob Levey/Getty Images)

HOUSTON - JUNE 12: First Lady Laura Bush embraces her mother-in-law Barbara Bush (L) as former President George H.W. Bush and President George W. Bush talk as they are introduced at the opening of the elder Bush's 80th birthday celebration June 12, 2004 in Houston, Texas. Bush senior plans on going skydiving on July 13 to celebrate. (Photo by Brett Coomer/Getty Images)

WASHINGTON - JUNE 10: Former U.S. President George H.W. Bush and his wife, Barbara Bush, pay their respects to former U.S. President Ronald Reagan in the U.S. Capitol Rotunda June 10, 2004 in Washington, DC. Reagan's body will lie in state until his funeral at the National Cathederal June 11 in Washington, DC. (Photo by Brendan Smialowski/Getty Images)

HOUSTON, TX - FEBRUARY 05: President George H.W. Bush arrives for the coin toss prior to Super Bowl 51 between the Atlanta Falcons and the New England Patriots at NRG Stadium on February 5, 2017 in Houston, Texas. (Photo by Al Bello/Getty Images)

HOUSTON, TX - NOVEMBER 17: Country music star Larry Gatlin, left, shares a moment with President George W. Bush, center, and George H.W. Bush before the Houston Texans play the Oakland Raiders at Reliant Stadium on November 17, 2013 in Houston, Texas. (Photo by Bob Levey/Getty Images)

9 Oct 2001: Former president George Bush gives thumbs up as wife, Barbara Bush looks on before game one of the National League divisional series at Enron Field in Houston, Texas. The Braves won 7-4. DIGITAL IMAGE Mandatory Credit: Brian Bahr/ALLSPORT