Charles Tiefer is Professor of Law at the University of Baltimore. As Solicitor of the House of Representatives from 1984 to 1995 and Assistant Senate Legal Counsel before that, he represented both houses of Congress and conducted investigations on domestic and foreign affairs under four presidents. He is the author of three previous books, including the classic 1,000-page manual of congressional procedure, "The Semi-Sovereign Presidency "(1994) about the previous President Bush, and dozens of respected legal articles.