Huckabee, who has either ranked first or tied for first in all three surveys since February, does not spark strong socioeconomic differences in Republicans’ support, nor does Newt Gingrich or Ron Paul.

Support for other candidates included in Gallup polling, including Michele Bachmann, Mitch Daniels, and Tim Pawlenty, is in the low single digits, a level at which demographic distinctions are less meaningful.