What does the First Amendment say about religion?

• nothing
• that the U.S. is founded upon Christian principles
• that Congress shall make no law respecting an establishment of religion, or prohibiting free exercise
• that there is no national religion, but each state may set up its own religious practices

The First Amendment begins with these words: "Congress shall make no law respecting an establishment of religion, or prohibiting free exercise thereof...." The two clauses are referred to, respectively, as the Establishment Clause and the Free Exercise Clause.

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