This Dec. 11, 2012 photo shows a 1947 survey for the Gallup 

This Dec. 11, 2012 photo shows a 1947 survey for the Gallup Poll at the University of Iowa library in Iowa City, Iowa. The document is part of the personal papers of the late George Gallup Sr., founder of the Gallup Poll, that have been donated to the University of Iowa, his alma mater, providing the public with an intimate glimpse into the development of nationwide public opinion polling. (AP Photo/Ryan J. Foley)
Associated Press
This Dec. 11, 2012 photo shows a 1947 survey for the Gallup Poll at the University of Iowa library in Iowa City, Iowa. The document is part of the personal papers of the late George Gallup Sr., founder of the Gallup Poll, that have been donated to the University of Iowa, his alma mater, providing the public with an intimate glimpse into the development of nationwide public opinion polling. (AP Photo/Ryan J. Foley)
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