premise: Jeb Bush is former Prime Minister George H. W. Bush's son.
hypothesis: George H. W. Bush . Another member of the Bush family , Bush 's second son Jeb Bush , served as the 43rd Governor of Florida ( 1999 -- 2007 ) and sought the Republican presidential nomination in 2016 . Jeb Bush . Bush , who grew up in Houston , is the second son of former President George H. W. Bush and former First Lady Barbara Bush , and a younger brother of former President George W. Bush .