New York-based political consultant Kieran Mahoney's statewide survey of probable Republican participants in the 2008 Iowa presidential caucuses shows this support for the ''big three'' GOP candidates: John McCain, 20.5 percent; Rudy Giuliani, 16.3 percent; Mitt Romney, 3.5 percent. Astonishingly, they all trail James Gilmore, the former governor of Virginia, with 31 percent. How could that be? Because it was not a legitimate survey, but a ''push poll.'' That normally is a clandestine effort to rig a poll by telling respondents negative things about various candidates. Mahoney makes no secret that his voter sample was told of liberal deviations by...