Gallup provides the most comprehensive coverage of U.S. voters' preferences in the 2008 presidential election. Conducting 1,000 interviews per night, each day Gallup reports current attitudes and candidate preferences based on a rolling average of roughly 2,700 registered voters, and each week Gallup posts highly reliable demographic or political subgroup voting patterns based on aggregates of interviews with over 6,000 registered voters. Gallup routinely reports even more in-depth analyses, taking into account extremely large, yet timely, national samples of registered voters and detailed demographic and political subgroups. Gallup combines this unprecedented breadth and depth of current data with historical trends dating back to 1936 for the most complete coverage available on the attitudes of the American electorate.
Gallup https://news.gallup.com/poll/110614/Election-Fast-Facts.aspx
Gallup World Headquarters, 901 F Street, Washington, D.C., 20001, U.S.A
+1 202.715.3030