Republican presidential candidate Newt Gingrich listens as he visits the Comprehensive Cancer Center at UAB Wednesday. March 7, 2012 in Birmingham, Ala. (AP Photo/The Birmingham News, Hal Yeager)

Associated Press
Republican presidential candidate Newt Gingrich listens as he visits the Comprehensive Cancer Center at UAB Wednesday. March 7, 2012 in Birmingham, Ala. (AP Photo/The Birmingham News, Hal Yeager)
Republican presidential candidate Newt Gingrich listens as he visits the Comprehensive Cancer Center at UAB Wednesday. March 7, 2012 in Birmingham, Ala. (AP Photo/The Birmingham News, Hal Yeager)
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