Trouble with Catholics?

Very interesting post from the The Atlantic on the voting patterns of Republicans in Iowa based on their religious affiliation. Clearly shows Mitt doing well with Catholics while Huck does well with rural Protestants. Does Huckabee's strong evangelical message turn off Catholics?

Did the bitter feud from the straw poll between Huck and Brownback have some lingering bad feelings?

Props to Alexham at RedState for pointing this out.