Elections: Opinion Polls

The Guide provides immediate access to tables and graphs that display the ebb and flow of public opinion, electoral behavior, and choice in American politics over time. It serves as a resource for political observers, policy makers, and journalists, teachers, students, and social scientists.
Tables compiled from the ANES datasets, cumulative file.

Roper Center Polling Data > US Elections
Exit polling data is collected by Edison Research, a market research and polling firm and purchased by major news networks for their forecasts. The Roper Center’s collection holds all U.S. major media exit polls dating back to the first in 1972, spearheaded by innovator Warren Mitofsky, as well as thousands of datasets from major pre- and post-election polls in the U.S.
See also:
Exit Polls: Surveying the American Electorate,1927-2010. Washington, DC: SAGE Publications Ltd. 2012
Authors Samuel J. Best and Brian S. Krueger - both election commentators for CBS news and statistical experts - present more than 100 tables and 100 figures showing the changes in the electorate and its voting patterns over time.

Gallup's public Web site provides articles summarizing the results of recent, selected polling data. Includes some international polling.
Detailed data available only to individual subscribers or in the print products we subscribe to: see the print section of this guide.

Well-organized site. I haven't had any luck with the "poll question" search, however, the Browse Topics page may work equally well.

Search by question via iPoll or browse the Elections and Presidents collection.