Who are more likely to vote Republican, white Catholics or white protestants?

Which group of voters do you think are more solidly in the Republican camp, white Catholics, or white protestants?. Patricia Miller writes at Salon,

According to the most recent polling from the Pew Research Center, 53 percent of white Catholics now favor the GOP, versus 39 percent who favor the Democrats—the largest point spread in the history of the Pew poll. And for the first time, white Catholics are more Republican than the voting group usually considered the ultimate Republicans: white Protestants (a designation that includes both mainline and evangelical Protestants).

Read more here.
Thanks to Betsy Newmark