Richard A. Arenberg served in senior congressional staff positions for 34 years as aide to Senate Majority Leader George Mitchell and Senators Paul Tsongas and Carl Levin. He is Adjunct Lecturer in Political Science and Public Policy at Brown University. Robert B. Dove is Parliamentarian Emeritus of the US Senate, having served as the Senate's Parliamentarian and Assistant Parliamentarian from 1966 to 2001. He is Adjunct Professor at the Georgetown University Law Center, George Washington University, and George Mason University.