What Is the Extent of the Speech and Debate Clause

That is a question being posed by the Bush Administration on an appeal of a decision related to the FBI raid on Rep. William Jefferson's Congressional office.

The cert petition asks:

“Whether the Speech or Debate Clause provides a non-disclosure privilege that bars Executive Branch agents from executing a judicially issued warrant in a Member’s office to search for non-legislative records of criminal activity.”

The cert petition is here and a good discussion of the case is here.