Gary C. Jacobson is Distinguished Emeritus Professor of Political Science at the University of California, San Diego. He received his PhD from Yale University in 1972 and has served on the Council of the American Political Science Association and on the Board of Overseers of National Election Studies. Jacobson's field of interest is American national politics, with a subfield focus on Congress and congressional elections, and his current research is on the electoral basis of partisan polarization in Congress. Among books he has authored or coauthored are Money in Congressional Elections, The Electoral Origins of Divided Government, and The Logic of American Politics.