The Democratic Party is facing a Catholic apocalypse

[King of Kensington]

It seems like the Catholic vote is more Democratic now than it was, say, 15 or 20 years ago. Maybe it's because Catholics are a little more urban than Southern-style evangelicals.

It's also a lot more Hispanic than it was 15 or 20 years ago.

"White ethnics" are increasingly "melted" as well.  Still white Catholics are more likely to live in more liberal regions of the country, and that has an effect.

It's been a long time since the Irish vote, the Italian vote and the Polish vote was measured.