Strong Bush performance and districts reaching north to GOP territory are factors in play. Whisper it softly but Republicans feel they could pull off a shock result in two unlikely South Texas races. Despite being heavily outspent, former Cuero Mayor Michael Thamm says he senses an upset in his Congressional District 15 battle against U.S. Rep. Rubén Hinojosa (D-Mercedes). If Thamm does win, the Rio Grande Valley would be left without a member of Congress who calls the border region home. After redistricting, CD15 reached from the Rio Grande Valley all the way up to the rapidly growing and largely...