Actor Vince Vaughn, known for funny films like “Wedding Crashers” and “Old School,” apparently is a fan of Rep. Ron Paul, R-Texas. So much so that he introduced Paul at the Liberty Political Action Conference in Reno, Nevada, on Friday. “Ron and Vince are friends, with Vince not merely interested in Dr. Paul’s philosophy, but he also graciously invited Dr. and Mrs. Paul to the premiere of his film ‘Couples Retreat,’ ” said Jesse Benton, chairman of Paul’s presidential campaign. Paul attended the 2009 premiere with his wife Carol.