Texas Lt. Gov. David Dewhurst and candidate for U.S. Senate speaks during the Texas Republican Convention in Fort Worth, Texas, Friday, June 8, 2012. Dewhurst is competing with Ted Cruz, a former state solicitor general and tea party favorite, for the Republican nomination to replace retiring Sen. Kay Bailey Hutchison. They face a runoff July 31 after no one in a crowded GOP field won a majority of the votes cast in last month's primary. (AP Photo/LM Otero)