Phil Houston is CEO of QVerity, a training and consulting company specializing in detecting deception by employing a model he developed while at the Central Intelligence Agency. He has conducted thousands of interviews and interrogations for the CIA and other federal agencies. His colleague Don Tennant contributed to this report.The eyebrow-raising story that appeared earlier this week in the National Enquirer, citing claims that Sen. Ted Cruz had engaged in five extramarital affairs, drew a sharp response by the Republican presidential contender. Sharp as it was, however, it was strikingly weak in terms of denial, and strong in terms of...