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This index is a comprehensive guide to the 25-volume Gallup Poll Annual Series, a source of American public opinion. It includes: results for every question included in the annual volumes; technical details; breakdowns of the results by key demographics; and opinion trends.

This study refers to Barack Obama's historic win in November 2008, recounting this fascinating presidential campaign. It features more than 1000 polls taken throughout the campaign by Gallup, the oldest and most respected polling company in the world.