Originally Posted by JonLaw
Separation of church and state is, by definition, an open question.

Not really, because the Supreme Court has answered the question definitively in a number of instances. Thomas Jefferson's famous interpretation of the First Amendment has been affirmed.

The boundaries of that separation are still frequently being tested, of course, but that a separation exists is well-established.

Originally Posted by JonLaw
A constitutional amendment could negate it.

We're an amendment away from constitutional monarchy, too.