FILE - In this 1964 file photo, George H.W. Bush sits on couch with his wife Barbara and their children. George W. Bush sits at right behind his mother. Behind couch are Neil and Jeb Bush. Sitting with parents are Dorothy and Marvin Bush. Again? Really? There are more than 300 million people in America, yet the same two families keep popping up when it comes to picking a president. The possibility of a Bush-Clinton matchup in 2016 is increasingly plausible. After months of hints and speculation, former Florida Gov. Jeb Bush last week said he's actively exploring a bid for the Republican nomination. And while Hillary Rodham Clinton hasn't revealed her intentions, she's seen as the odds-on favorite for the Democratic nomination. By Nancy Benac. ? (AP Photo, File)
President Barack Obama shares a laugh with former first lady Barbara Bush at the dedication of the George W. Bush presidential library on the campus of Southern Methodist University in Dallas, Thursday, April 25, 2013. (AP Photo/Charles Dharapak)
First Lady Barbara Bush poses with her dog Millie in 1990. (AP Photo/Doug Mills)
Former first lady Barbara Bush "Strains" to hear a reporters question while posing with other former first ladies, on Wednesday, May 11, 1994 at the U.S. Botanic Garden in Washington. Joining Mrs. Bush, from left are; Lady Bird Johnson, Betty Ford and Nancy Reagan. The women are in Washington to attend National Garden Gala-A Tribute to America's First Ladies. Mrs. Bush's response was to a question on a former White House usher who was fired recently by current first lady Hillary Rodham Clinton. (AP Photo/Denis Paquin)
U.S. President George H. Bush and Mrs. Barbara Bush attend the funeral of Emperor Hirohito, Friday, Feb. 24, 1989 at Shinjuku Imperial Garden in Tokyo with other world leaders. From left are Indonesian President and Mrs. Suharto, Zambian President Kenneth Kaunda, Mrs. Bush, President Bush, West German President Richard von Weizsaecker, and French President Francois Mitterrand. (AP Photo/Sadayuki Mikami)
President George Bush raises his right hand as he is sworn into office as the 41st president of the United States by Chief Justice William Rehnquist outside the west front of the Capitol on Jan. 20, 1989. First lady Barbara Bush holds the bible for her husband. Former President Reagan is in the background. (AP Photo/Bob Daugherty)
The Republican and Democratic candidates for president appear with New York?s Cardinal John J. O?Connor at the annual Alfred E. Smith dinner on Thursday, Oct. 21, 1988 in New York. Barbara Bush embraces her husband George Bush on the podium as she greets other guests. From left are: George H.W. Bush, Cardinal O?Connor, Michael Dukakis, New York Mayor Edward Koch and New Jersey Governor Thomas Kean. (AP Photo/Barry Thumma)
President and Mrs. Ronald Reagan, right, share a moment with Vice President and Mrs. George Bush following the oaths in the Capitol Building in Washington on Monday, Jan. 21, 1985. (AP Photo/Bob Daugherty)
Nancy Reagan, left and Barbara Bush, right, wives of the GOP nominees for President and Vice President, plead to a crowd lining a balcony for their votes in this Novembers general election on Sept. 15, 1980 in Baltimore, Md. The wives toured the Baltimore Inner Harbor while campaigning for their husbands. (AP Photo/William Smith)
Mrs. Barbara Bush, wife of the man nominated to head the central Intelligence Agency looks up from her needlepoint as her husband prepares to begin his testimony before the Senate Armed Services Committee on Monday, Dec. 16, 1975 in Washington. Bush, currently the official U.S. representative to the People?s Republic of China, appeared before the panel which is considering his nomination to the intelligence post. (AP Photo/CWH)
Rep. and Mrs. George Bush are shown in Houston as a network television program predicted his defeat for the U.S. Senate against Lloyd Bentsen the Democratic candidate on Nov. 3, 1970. Bush watched the returns in a hotel suite. (AP Photo/FK)
Barbara Pierce, the future Barbara Bush, is shown in her graduation photo from Ashley Hall, a finishing school in Charleston, S.C., in 1943. (AP Photo)
George Bush is sworn in as new director of the Central Intelligence Agency by Supreme Court Associate Justice Potter Stewart, left, as Mrs Barbara Bush and President Gerald Ford, at right, look on at CIA headquarters in Langley, Va., January 30, 1976. Bush succeeds William Colby who retired. (AP Photo)
Mrs.Barbara Bush shown April 13,1971.(AP Photo/Anthony Camerano)
George Bush, candidate for the Republican nomination for the U.S. Senate, gets returns by phone at his headquarters in Houston, Saturday, June 6, 1964 as his wife Barbara, beams her pleasure at the news. Bush was leading his opponent Jack Cox in the run-off primary. Bush will face Sen. Ralph Yarborough (D-Tex) in the November general election if his lead holds and he is the winner. (AP Photo/Ed Kolenovsky)
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