DENVER, COLORADO - JUNE 27: Scott Walker speaks during the Western Conservative Summit at the Colorado Convention Center in Denver, Colorado on June 27, 2015 in Denver, Colorado. The Western Conservative Summit attracts thousands of conservatives and a number of prominent politicians; this year the lineup includes Rick Santorum, Mike Huckabee, Carly Fiorina, Ben Carson, and Scott Walker. (Photo by Theo Stroomer/Getty Images)
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