This story from the Washington Post on the efforts of Archbishop Raymond Burke in St. Louis to enforce doctrinal norms.

These United States have been a challenge for Roman Catholicism since our founding. People living in a society of participatory government tend to move that assumption into church and want a voice. People living in a modernizing, and now postmodernizing, culture tend to bring that culture into church. People living in a society glorifying individualism tend to bring that attitude into church.

Of course, Roman Catholics are not unique in this. Christians around the world say that there is a reality called "American Christianity." We just have trouble seeing it here for the same reason that fish do not notice water.