Washington (CNN) The Bush family might just be the only one in the United States where an inside joke includes some friendly ribbing about the possibility of becoming the leader of the free world.

George P. Bush, the oldest son of former Florida Gov. Jeb Bush, is the only Bush currently pursuing a life in politics. His own family teasingly calls him "47," a reference to the fact that President George H.W. Bush became known as "41" and President George W. Bush became known as "43."



For George P., as he's called by his family, and the rest of the younger Bush generation, it will be no easy task living up to their famous parents and grandparents. But their sense of duty and public service was instilled by both of their grandparents from an early age.

"One of Barbara Bush's favorite pieces of advice was, 'Don't worry if your children never listen to you. Worry more that they are watching you,'" said Jean Becker, former chief of staff to George H.W. Bush.

The 17 Bush grandchildren clearly have been watching, with many of them continuing the family's tradition of service, which goes back generations.

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