This is terrible. If GW thinks someone is a terrorist, that person may be treated as a terrorist -- no due process to determine that the person is actually a terrorist. This troubles me a lot less in GW's hands than in some of the other possibilities I can think of for Presidents in the future, but he is only going to "know" what he is told by people whose agendas we don't fully know.
Way too much power in the hands of one fallible man.
BTW, I hope you saw #59 above by Iwo Jima. . . . . the best post on the thread, IMO.