Whether you consider the clock to be Rush or the ACLU in this case is up to you. There are times when the ACLU does some good work. There are other times, such as 2nd Amendment cases, when IMO they don't.

In the end, medical records are among the most personal data that any of us have. There are many possibilities for misuse, especially in the political arena. Several years ago, I saw a news story about a woman who was running for Congress from NYC. At some point in her past, she'd been treated for depression. If memory serves, she may have attempted suicide. Someone leaked her medical records to her opponent who in turn tried to use it against her. Fortunately, the tactic backfired and she won the election.

As for the Right to Privacy, it isn't hard to understand in the context of the 4th Amendment or the 9th Amendment. According to the 9th Amendment, the enumerated rights listed in the Constitution aren't all inclusive.

The enumeration in the Constitution, of certain rights, shall not be construed to deny or disparage others retained by the people.

Some of the Founders felt the Bill of Rights was unnecessary because they believed such notions as freedom of speech and religion were so obvious that there was no point in explicitly writing them down.