This Dec. 11, 2012 photo shows a 1948 cover of Time Magazine featuring the late George Gallup Sr., the founder of the Gallup Poll, at the University of Iowa library in Iowa City, Iowa. Gallup's grandchildren recently donated more than 200 boxes of papers that document the career of Gallup, who is considered the father of modern political polling. (AP Photo/Ryan J. Foley)

Associated Press
This Dec. 11, 2012 photo shows a 1948 cover of Time Magazine featuring the late George Gallup Sr., the founder of the Gallup Poll, at the University of Iowa library in Iowa City, Iowa. Gallup's grandchildren recently donated more than 200 boxes of papers that document the career of Gallup, who is considered the father of modern political polling. (AP Photo/Ryan J. Foley)
This Dec. 11, 2012 photo shows a 1948 cover of Time Magazine featuring the late George Gallup Sr., the founder of the Gallup Poll, at the University of Iowa library in Iowa City, Iowa. Gallup's grandchildren recently donated more than 200 boxes of papers that document the career of Gallup, who is considered the father of modern political polling. (AP Photo/Ryan J. Foley)
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