John Conyers actually said...

The Fourth Amendment is critical. And I do not think that the Supreme Court--the courts have not finally ruled on what is going on.

That answer is not satisfactory, and the public deserves better.

There is no question that the government can and does intercept and listen in on the communications of U.S. persons.

This practice is explicitly prohibited by law--but with so much about these programs conducted in secret, we have no way of knowing for sure...