AUSTIN — Two losing Texas House Republican candidates, including House Speaker Tom Craddick's most powerful lieutenant, sought Wednesday to have the GOP-controlled House overturn their races' results or order new elections. Also Wednesday, one-term Rep. Ken Mercer of San Antonio decided against contesting his 498-vote loss to Democratic challenger David Leibowitz in a bitterly contested District 117 race. As expected, Talmadge Heflin of Houston and Eric Opiela of Karnes City filed documents Wednesday with the secretary of state's office formally contesting the results of their races. History is not on their side: In the 10 times since 1942 that such...