So says Bush's son, George P. Bush, in an interview that aired Sunday on ABC."I think it's actually, I think it's more than likely that he's giving this a serious thought in moving forward," Bush said of his father, the foremer Florida governor. --Jon TerbushMore ABC news videos | ABC Health NewsBush has hinted that he may run in 2016, though his theoretical support for tax increases and a pathway to citizenship for some immigrants may hurt his candidacy in the conservative-heavy GOP primaries.