Texas Lt. Gov. David Dewhurst greets supporters outside a Houston deli Tuesday, 

Texas Lt. Gov. David Dewhurst greets supporters outside a Houston deli Tuesday, July 31, 2012. Dewhurst faces former Texas Solicitor General Ted Cruz in the Republican primary runoff election for U.S. Senator. (AP Photo/Pat Sullivan)
Associated Press
Texas Lt. Gov. David Dewhurst greets supporters outside a Houston deli Tuesday, July 31, 2012. Dewhurst faces former Texas Solicitor General Ted Cruz in the Republican primary runoff election for U.S. Senator. (AP Photo/Pat Sullivan)
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