G. Evans Witt is a principal and CEO of Princeton Data Source. He is a nationally recognized expert on public opinion, politics and the news media. Witt has been involved in survey research for almost 30 years. In a 22-year career with The Associated Press, he helped lead the wire service in the use of public opinion polls and social science research methods. He was a co-founder of the AP/NBC News Poll in 1977. He was a national political writer, director of election planning and assistant chief of the AP Washington bureau. In 1996, Witt directed the creation of two award-winning political Web sites, ElectionLine and PoliticsNow, for ABC News, The Washington Post and National Journal. From 1997-1998, he was executive director of Voter News Service, which conducted exit polls for the nation’s news media. Since 1998, he has served as CEO of PDS, helping direct the company's growth, modernizing its operations and directing major research projects.

A Morehead Scholar and graduate of the University of North Carolina at Chapel Hill, Witt was a National Endowment for Humanities Fellow at Stanford University in 1981-82.

Witt is the co-author, along with Sheldon Gawiser, of A Journalist's Guide to Public Opinion Polls (Praeger Press, 1994) and of Twenty Questions A Journalist Should Ask About Poll Results (National Council on Public Polls, 2005), now in its third edition. He has written numerous articles on public opinion and lectured widely on the proper use of public opinion research.