Dem-speak is fun stuff. As noted by Ed Whelan, the term "anti-Catholic" to U.S. Senator Patrick Leahy (D-VT)apparently means one Catholic, i.e., judicial nominee Robert T. Conrad, criticizing another Catholic, a nun, for displaying contempt toward the Catholic Church.
On a side note, I wonder if Judge Conrad dared the nun he criticized to knock a battery off his shoulder. (Oh, like you weren't thinking that).