 Marshals to arrest the judges and force them to testify.Gingrich's proposal drew criticism across the political spectrum.Harvard Law School professor Laurence Tribe (who described it as "a frontal assault on the independence of the federal judiciary" and "one of the craziest and most obviously unconstitutional things the former Speaker has ever proposed"), prominent conservative lawyer Bruce Fein (who wrote that "Gingrich unwittingly is proposing to overthrow the Constitution that he would be pledged to uphold and defend if elected"), and U.S. District Judge John L. Kane (who wrote that Gingrich's proposal would contravene the rule of law and the notion of judicial independence as set forth in Federalist No.