I’ve now been to three national political conventions … the 2000 RNC in Philadelphia, the 2004 RNC in New York and Denver’s DNC. One thing all share is confusion over security … things like where can you can go with the press pass you’re issued. The confusion usually results from the hundreds of well-meaning but poorly trained volunteers helping to run a huge event. Constantly changing security concerns also contribute. I spent some time down on the floor of Invesco Field Thursday. Over a couple of hours, various security personnel told me the same paperwork was either right — or wrong — to be on the floor. Delegates have special passes too. One delegate, I don’t remember from what state, returned the designated seating area where he, his wife and daughter had been allowed access earlier. The person checking passes said he could not go back in because he had the wrong credentials for that area, even though he and his family were granted access a few minutes earlier. He phoned his wife to tell her he wouldn’t be coming back.