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Huckabee’s Catholic Problem

If a picture is worth a thousand words, these graphics by Philip Klinkner demonstrate that Mike Huckabee had a real problem with Catholics in Iowa:

Henery Farrell observes:

An eyeballing of the graph suggests that the parts of the state where Huckabee had most trouble were indeed, more often than not, those places where there were more Catholics. Klinkner runs a regression testing how percentage of population religious, percentage of population Catholic, percentage of population evangelical, and percentage of population rural affected voting for Huckabee, and finds that the coefficient for Catholicism is negative, high, and statistically significant.