The Maryland Senator's voting record and positions on a wide range of matters.

Information from PVS including the Senator's biography, issue positions, interest group ratings, committee assignments, campaign finances, and voting record.

Official site, including biography of the state's longest-serving Senator, news, statements, constituent services, Maryland information, contact details, links, visting Washington D.C., initiatives, stuff for kids, and contact details.

Cosponsorship of major legislation, contact details, biography, key votes, staff members, open letters to this U.S. Senator, and campaign contribution data.