It's mad. Catholics in Ireland (particularly up north) are far more likely to vote for a catholic than a protestant, and vice-versa. But in America identity politics seems non-existant among catholics.
Only up North, surely.
The vast majority is up north, but I've seen some identity voting in places like Monaghan too. Of course it's not an issue when there are no/very few protestants in the area/on the ballot which is quite common.
Well, when I said the North I really meant Ulster... so I'd include Monaghan in that.