Raleigh — The United States Attorney General suggested Sunday that his office might investigate the way District Attorney Mike Nifong has handled the Duke lacrosse rape case. In an interview with Fox News on Sunday, United States Attorney General Alberto Gonzales confirmed he received a letter asking for a federal probe into the investigation, in which an exotic dancer claims three lacrosse players raped her at a March 13 party. "Well, that is a letter that we recently received," Gonzales told Fox News' Brian Wilson. "It's being evaluated at the (Department of Justice). I can't say anything -- anything beyond...