George W. Bush (C) poses with father George Bush and his mother Barbara Bush in Rye, New York, summer 1955. George W. Bush is currently campaigning for the Republican party for the presidential election in November 2000. (Photo by Newsmakers)
29th Annual T.J. Martell Foundation Awards Gala
NEW YORK - MAY 27: Former President George H. W. Bush and his wife Barbara 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)
GOP Convention Continues in NYC
NEW YORK - AUGUST 31: (L to R) Maria Shriver and former President George H.W. Bush applaud from the audience on night two of the Republican National Convention August 31, 2004 at Madison Square Garden in New York City. (Photo by Shaun Heasley/Getty Images)
George H.W. Bush and son George W. Bush
HOUSTON, UNITED STATES: File photo dated 10 June, 1999 shows Texas Governor and presidential hopeful George W. Bush (L) laughing with his father, former US President George Bush (R) between takes of a family portrait prior to a gala celebration honoring the elder Bush's 75th birthday in Houston, Texas. The former president was hospitalized 25 February, 2000 in a Naples, Florida, hospital after feeling light-headed during a conference of bankers. According to the former president's spokesman, Jim McGarth, Bush is being treated for an irregular heart beat. McGarth added that it was "not a serious condition." AFP PHOTO FILES-PAUL BUCK
Former US President George Bush (L) waves
COLLEGE STATION, UNITED STATES: Former US President George Bush (L) waves as US President Bill Clinton stands by during the dedication ceremony at the George Bush Library at Texas A&M University in College Station, TX, 06 November. The current and former presidents of the US and a host of former world leaders and policy makers attended the 06 November dedication of the library. (ELECTRONIC IMAGE) AFP PHOTO Paul J. RICHARDS (PAUL J. RICHARDS/AFP/Getty Images)
Former US President George Herbert Walker Bush
WASHINGTON, : Former US President George Herbert Walker Bush speaks after being awarded the American Patriot Award, 06 December 2002, during the American Patriot Award Dinner in Washington, DC. AFP PHOTO/Shawn THEW (SHAWN THEW/AFP/Getty Images)
US President George W. Bush (L) plays golf
KENNEBUNKPORT, UNITED STATES: US President George W. Bush (L) plays a round of golf on his 55th birthday with his father former President George Bush (R) at Cape Arundel Golf Club 06 July, 2001 in Kennebunkport, ME. The two are wearing hats with their respective office numbers, George W. being the 43rd President and George Bush having been the 41st President. AFP PHOTO/TIM SLOAN (TIM SLOAN/AFP/Getty Images)
Former Presidents Bush, Clinton Call For Donations
WASHINGTON - JANUARY 5: Former U.S. presidents George H. W. Bush (L) and Bill Clinton film a public service announcement in the White House Library encouraging Americans to make cash donations to the tsunami relief effort through www.usafreedomcorps.gov January 5, 2005 in Washington, DC. (Photo by Eric Draper/White House via Getty Images)
U.S. President George Bush talks
BRANSON, MO - AUGUST 21: U.S. President George Bush talks to a large gathering of people 21 August 1992 at Silver Dollar City in Branson, Missouri. This is Bush's second campaign stop since the Republican Convention ended 20 August. (J.DAVID AKE/AFP/Getty Images)
Former US President George Bush
HOUSTON, TX - FEBRUARY 27: Former US President George Bush (L) greets republican presidential candidate US Senate Majority Leader Bob Dole (R) outside of President Bush's Houston, Texas, office 06 March. Senator Dole is campaigning in Texas in preparation for Super Tuesday, 12 March. (ELECTRONIC IMAGE) (J. DAVID AKE/AFP/Getty Images)
XXXIX Superbowl Pregame Show
JACKSONVILLE, FL - FEBRUARY 06: (L-R) FOX Sportscaster Terry Bradshaw speaks with former U.S. Presidents George Bush and Bill Clinton in the FOX Broadcast booth during the XXXIX Superbowl pregame show at Alltel Stadium on February 6, 2005 in Jacksonville, Florida. (Photo by Frank Micelotta/Getty Images)
German Point Alpha Prize
FULDA, GERMANY - JUNE 17: (L to R) Former U.S. President George Bush, former Soviet President Mikhail Gorbatchev and former German Chancellor Helmut Kohl display their trophies during the 'Point Alpha Prize' ceremony on June 17, 2005 in Geisa near Fulda, Germany. The three statesmen received the new German 'Point Alpha Prize' for their efforts leading to Germany's reunion in 1989. The ceremony took part at a former U.S. Army observation post called 'Point Alpha', near the iron curtain between East Germany and West Germany, which is now a memorial. (Photo by Ralph Orlowski/Getty Images)
US President George Bush
US President George Bush (L) shares a joke with Soviet leader Mikhail Gorbachev (R) on December 03, 1989 on board the soviet cruise "Maxim Gorki", shipdocked at Marsaxlokk harbour, during their joint press conference at the end of their two-day first summit meeting. This summit is viewed as the official end of the Cold War. (JONATHAN UTZ/AFP/Getty Images)
Margaret Thatcher and George H.W. Bush
Former British Prime Minister Margaret Thatcher (L) smiles as she chats with US President George Bush 07 March 1991 in the White House Oval Office in Washington before receiving the medal of Freedom in an East Room ceremony. The medal of Freedom is the highest civilian honor bestowed in the United . (LUKE FRAZZA/AFP/Getty Images)
George H.W. Bush
US President George Bush poses for photographers after his address to the nation, 27 September 1991, in the Oval Office of the White House. During his speech, Bush announced that the US will unilaterally eliminate its land and sea-based short-range nuclear weapons. (LUKE FRAZZA/AFP/Getty Images)
Bush greets supporters
Ohio: U.S. President George Bush greets supporters 28 October, 1992 during an airport rally six days before the Presidential election. Democratic candidate Bill Clinton leads Bush and Ross Perot in the Ohio state polls. (DAVID AKE/AFP/Getty Images)
Mandela and Bush
South African anti-apartheid leader and African National Congress (ANC) member Nelson Mandela (L) waves to the media and fans 25 June 1990 after finishing his joint statement with former US President George Bush (R) on the White House South Lawn in Washington,DC. AFP PHOTO/Kevin LARKIN (KEVIN LARKIN/AFP/Getty Images)
George H.W. Bush and Barbara Bush
George Herbert Walker Bush poses with his wife Barbara during his campaign for Congress in the 1960's. Born 12 June 1924 in Milton, Massachussetts, George Bush Yale graduated with a degree in Economics in 1948, made a fortune drilling oil before entering politics in 1964. US Congressman from Texas (1966-1970), ambassador to the United nations (1971-1974), Special Envoy to China (1974-1975), Republican National Chairman (1975-1976), Central Intelligence Agency (CIA) director (1976-1977), vice president of the US (1981-1959) George Bush is eventually elected president of the US 08 November 1988 against Democratic nominee Michael Dukakis. AFP PHOTO/WHITE HOUSE (AFP/Getty Images)
Bush and Yeltsin
US President George Bush (L) and Russian President Boris Yeltsin (R) shake hands after signing a historical strategic arms reduction treaty "START-2" on January 03, 1993 in the Kremlin in Moscow, which will guaranty the reduction of the nuclear arsenals of the US and Russia by two-thirds. (Photo by DAVID AKE / AFP) (DAVID AKE/AFP/Getty Images)
George H.W. Bush
Former US President George H. W. Bush points to his wife Barbara Bush during an event in the East Room of the White House July 15, 2013 in Washington, DC. Obama hosted former US President George H. W. Bush and Barbara Bush to honor the 5000th Daily Point of Light Award which is a program started in response to Bush's call for volunteerism. AFP PHOTO/Brendan SMIALOWSKI (BRENDAN SMIALOWSKI/AFP/Getty Images)
George H.W. Bush
French Secretary General of the Presidency Pierre Beregovoy (L) welcomes US Vice-President George Bush (C) on June 24, 1981 at the Elysee Palace in Paris. AFP PHOTO MICHEL CLEMENT (MICHEL CLEMENT/AFP/Getty Images)
Duke v Gonzaga
HOUSTON, TX - MARCH 29: (L-R) Former First Lady Barbara Bush and former President George H.W. Bush look on prior to the South Regional Final of the 2015 NCAA Men's Basketball Tournament between the Duke Blue Devils and the Gonzaga Bulldogs at NRG Stadium on March 29, 2015 in Houston, Texas. (Photo by Tom Pennington/Getty Images)
Super Bowl LI - New England Patriots v Atlanta Falcons
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 Patrick Smith/Getty Images)
George H.W. Bush
(L-R) Former US Presidents, Jimmy Carter, George H. W. Bush, Barack Obama, George W. Bush and Bill Clinton attend the Hurricane Relief concert in College Station, Texas, on October 21, 2017. (Photo by JIM CHAPIN / AFP) (JIM CHAPIN/AFP/Getty Images)
World Series - Los Angeles Dodgers v Houston Astros - Game Five
HOUSTON, TX - OCTOBER 29: Former United States president George H.W. Bush prepares to throw out a ceremonial first pitch before game five of the 2017 World Series between the Houston Astros and the Los Angeles Dodgers at Minute Maid Park on October 29, 2017 in Houston, Texas. (Photo by David J. Phillip - Pool/Getty Images)