The stakes were high Tuesday night as U.S. Rep. Colin Allred, the Democratic nominee for U.S. Senate, and Republican Senator Ted Cruz, seeking re-election to a third term, met for their first and only debate. Allred, 41, a civil rights attorney and former NFL linebacker repeatedly knocked down Cruz, 53, running for a third term in office. The U.S. Senate majority is expected to be decided by possibly just two seats. “WFAA issued a new poll for the more than 40,000 viewers on the YouTube livestream asking who won the debate,” MySanAntonio.com reported. “More than 25,000 viewers voted with 67 pe…