After the Switch in the U.S. Senate: 5 Key People to Watch

By JEFFREY BRAINARD, KELLY FIELD, and JEFFREY SELINGO

Washington

Sen. Edward M. Kennedy
Democrat of Massachusetts
Mr. Kennedy will be chairman of the chamber's Committee on Health, Education, Labor, and Pensions. As a member of the minority party for the past few years, this larger-than-life liberal has frequently taken...