Six members of the United States Supreme Court are Roman Catholic: Chief Justice John Roberts and Justices Sonia Sotomayor, Antonin Scalia, Anthony Kennedy, Clarence Thomas and Samuel Alito. (I don't know how many are practicing Roman Catholics.)

Red Mass before Court Session. from Newsmax.
Amazing. In pre-Civil War America Irish immigrants regularly faced discrimination, and earlier even riots, mostly because they were Roman Catholics. In the same period Protestant organizations raised money for missions in the West by arguing that if Protestants did not make converts on the frontier first, then the Romans were sure to do so, with dire and deadly results for the nation.

In the 1960 presidential election, JFK's Roman Catholicism was an issue.

Several questions come to mind, for which I have no answers. What is it about growing up Roman Catholic that increases the odds of becoming a Supreme Court Justice? Which Justices think with a coherent Roman Catholic world-view and how does that affect their opinions? Which religious traditions are under-represented, compared to the U.S. population?