There is no way that I would trade up for Peterson, and Dallas would be foolish to trade down for a player like Harris and leave a higher rated defensive or offensive linemen on the board. Why would you trade up for Peterson when he's not nearly the safety that Eric Berry was at Tennessee or as highly rated as Earl Thomas.
If Peterson is drafted to play CB by the Cowboys, Newman is going to be gone. Furthermore, I think that would be a big mistake, because Newman has some good football left in him at CB and has earned the right of any benefit of the doubt over the last 8 years.
Trading up and drafting a some what risky player like Peterson, when he is not Champ Bailey or Eric Berry, would be foolish, imso. I wouldn't be too surprised if Peterson was there at number 9, and I wouldn't take him.
If you trade up for a defensive player, you go up for Marcell Dareus, not Peterson, imo. I hope that it is smoke. I don't like it at all.
I'm really wanting Tyron Smith right now, and if an offensive linemen goes in round one, I think it will be Smith. Furthermore, I think it will be the Cowboys that take him. If Dallas doesn't take Smith, he will not last long after 9, but he will likely pass Washington, who will either take Julio Jones or a QB.