With less than three weeks left to go in the presidential campaign, Sen. John McCain is lagging somewhere around 8 points behind his Democratic challenger, Sen. Barack Obama. A New York Times poll released yesterday shows that the recent attacks by McCain and his running mate, Gov. Sarah Palin have not only failed to put a dent in Obama’s lead, they’ve turned fickle independent voters against the Republican team. Now McCain has turned his attention to a specter greater than Bill Ayers: voter fraud. But those who study the issue say it is a rare occurrence inflated and used as a tool of something much more prevalent: voter intimidation and suppression.