Well best of luck. Try and keep focussed on single issues. A standard argument technique is the shotgun blast of misinformation. Don't get caught up in that game. Focus on the primary issues. If he is a reader, then there are loads of well researched op-ed columns to help make your points. If he refuses to read... too busy, doesn't have the time, etc., you may have someone who really is quite dogmatic and doesn't want to be bothered by the facts.