This means that thousands of pages of documents and materials seized from Jefferson's office, none of which have been turned over to federal prosecutors yet, will need to be reviewed to determine whether they are privileged under the Speech or Debate Clause, a constitutional privilege that protects lawmakers and staff from legal action for legislative activities.
DOJ had been arguing that the August 2007 ruling by the U.S. Court of Appeals for the District of Columbia Circuit - which found the FBI search an unconstitutional violation of Jefferson's privileges under the Speech or Debate Clause - is hampering ongoing criminal investigations of lawmakers.
But Jefferson's lawyers argued Supreme Court against intervention, saying that the lower-court ruling was correct. A bipartisan group of former House leadership aides also argued against having the Supreme Court step into the case.
The Supreme Court decision is a blow to the Justice Dept., and it will likely further delay consideration of Jefferson's criminal case since now he will be able to indivually challenge the seizure of any and all documents and materials taken in the raid, a process that could take years.
It's also a rebuke to Chief Judge Thomas F. Hogan of the U.S. District Court for the District of Columbia, who approved the search warrant allowing FBI agents to enter Jefferson's office in the Rayburn House Office Building. Hogan must now rule on whether any of the seized materials are privileged under Speech or Debate.