"Federal criminal law protects witnesses called before official Congressional committee proceedings from anyone who may obstruct or impede a witness’ attendance or testimony."

"More specifically," said the Senate's top Republican, "the law protects a witness from anyone who - by threats, force, or by any threatening letter or communication - influences, obstructs, or impedes an inquiry or investigation by Congress.

"Anyone who violates this law is subject to criminal fines and imprisonment," Frist said.

His comments appeared to be directed at Florida state judge George Greer, who brazenly defied the Enzi subpoena on Friday and ordered Schiavo's starvation to commence.

Frist's statement echoed comments by House Majority Leader Tom DeLay, who said late Friday that he intended to charge Greer with contempt of Congress.

"No little judge sitting in a state district court in Florida is going to usurp the authority of Congress," he complained.

Though legal experts disagree, Georgetown Law professor Paul Rothstein said the Schiavo subpoena was within the purview of Congress' authority.

"I think Judge Greer is making a legal mistake and is vulnerable," Rothstein told Newsday. "Provided that Congress is making legitimate investigations for making law, they have the power to seek evidence."

Editor's note: