>> well w all due respect to professor koback, i could not possibly agree or disagree more. in simple terms, we have to look at it this way. the constitution gives some powers to the federal government and some powers to the state government. now it is true that on occasion there is some gray area but there is no gray area here it congress, most of the laws that i believe professor koback refer to are delegated authority by congress to the state. in this situation -- >> that's not correct. >> in this situation-- in this situation the state of arizona has just taken upon itself to assume and take over a national policy here. so that is certainly not concurrent. that is the seizing of power. the fundamental problem here is that this is federal supreme power and congress has, in fact, acted as the justice department's complaint in this case has set forth, there's a legion of federal legislation regulating how the federal government regulates immigration and naturalization. how individuals should be treated. and what has happened here is that by setting up this scheme, arizona s