March 6 (UPI) -- U.S. Rep. Tony Gonzales, R-Texas, announced on Friday that he is ending his campaign for re-election after acknowledging an extramarital affair that he had been denying for months. House Republican leadership called for Gonzales to pull out of the race after the House Ethics Committee said it was investigating the three-term member of Congress over the affair and he then admitted to it on a radio show hours later. After Tuesday's primary, Gonzales was to face a runoff for the