Republican U.S. Senate candidate Bob Corker holds a 16-point lead over his Aug. 3 primary election opponents, according to a poll conducted last week for the Chattanooga Times Free Press. "Corker looks to be in pretty good shape," said Brad Coker, managing director of Washington, D.C.-based Mason-Dixon Polling & Research Inc. "I would clearly put him in there as the favorite and the front-runner at this point." Thirty-nine percent of likely Republican primary voters surveyed said they would vote for Mr. Corker, compared to 23 percent for Ed Bryant and 22 percent for Van Hilleary. One percent of respondents said...