By way of Polysigh, some number crunching on Huckabee's Iowa win. The more Catholic counties were less likely to support him. Not good news when you think about the national ramifications. If the GOP nominates Huckabee and becomes even more southern-based, this could be a trend working against them in November.
The blue counties are Huckabee counties, the Red are Romney. In the bottom map, the darker the red, the more Catholic the county.