Nexis Uni This link opens in a new windowFound in the Reference Area of Lexis-Nexis Academic, the Polls & Surveys file provides a comprehensive full-text collection of public opinion in the United States. The file includes actual data from a wide variety of sources such as Gallup, Harris, Roper; ABC, CBS, CNN and NBC; Los Angeles Times, NewYork Times, USA Today and Wall Street Journal. The file is maintained by the Roper Center for Public Opinion Research.