Congress's Power To Compel

Such a strategy leaves Congress beholden to hostile executive branch officials to enforce its prerogatives on exactly the type of charges that the administration said this week it would not allow officials to pursue. This strategy also would allow the president to pardon his underlings should they ever be indicted and convicted.

Yet under historic and undisturbed law, Congress can enforce its own orders against recalcitrant witnesses without involving the executive branch and without leaving open the possibility of presidential pardon.

And a Supreme Court majority would find it hard to object in the face of two entrenched legal principles.

First is the inherent power of Congress to require testimony on matters within its legislative oversight jurisdiction.

So long as Congress is investigating issues over which it has the power to legislate, it can compel witnesses to appear and respond to questions. That power has been affirmed over and over in prosecutions for contempt.

In modern times, this congressional power has been enforced by referring contempt cases to the U.S. attorney for the District of Columbia for indictment and prosecution. That, of course, is the rub. It allows the president to exercise his plenary power under the Constitution to issue pardons "for offenses against the United States."

But no law says that indictment and prosecution by the Justice Department is the exclusive means to enforce congressional prerogative.

Indeed, in an 1895 case ( United States v. Chapman), the defendant unsuccessfully argued that Congress could not have such cases of contempt prosecuted through the courts but must punish such defiance on its own, without judicial assistance. The U.S. Court of Appeals for the District of Columbia held that judicial enforcement of Congress's inherent power was optional.

This power of Congress to punish contemptuous behavior itself was reinforced in 1934. In Jurney v. McCracken, the Supreme Court denied a writ of habeas corpus to a petitioner who had been taken into custody by the Senate sergeant- at-arms for allegedly destroying documents requested in a Senate subpoena.

The limitation on the president's pardon power was most comprehensively discussed in a 1925 opinion by Chief Justice (and former president) William Howard Taft in the case of Ex Parte Grossman.

Grossman had been accused during Prohibition of the illegal sale of liquor and was enjoined by a federal court from further sale of alcoholic beverages. When he violated the order, he was accused of contempt and sentenced to prison -- and then pardoned by the president.