Bush is followed in the poll by Florida Sen. Marco Rubio with 18 percent, Wisconsin Gov. Scott Walker with 14 percent, Cruz and Kentucky Sen. Rand Paul with 11 percent, Carson with 7 percent, Huckabee and New Jersey Gov. Chris Christie at 5 percent, former Texas Gov. Rick Perry at 2 percent and former Hewlett-Packard chief executive Carly Fiorina at 1 percent.