Here is a case we are going to get to know well during the debate over the use of presidential power that exceeds the constitution. A president's assertion of authority on claims based on "inherent power" and Commander in Chief was struck down.
http://usinfo.state.gov/usa/infousa/facts/democrac/59.htmThe following is my take on this, and beware, my doctorate is in a field of science, not jurisprudence. I may not have emphasized the right points but it seems this is a case we are going to here a lot about.
Once upon a time, well actually in 1952...
Truman attempted to forestall strikes among steelworkers by having the federal government seize the steel industry (Yeah, that got my attention, too). Truman felt that during a time of war (Korea)he had this power although it seemed to exceed his constitutional authority.
Not surprisingly, this sort of intervention in labor disputes had no basis in any law. For our current problem of unwarranted surveillance on Americans it is important to recognize that Truman argued that his authority stemmed from his role as Executive, from implied aggregate powers _AND_ as Commander and Chief. Yes, this sounds very familiar doesn't it?
Well, the steel industry brought suite against the seizure on the grounds that the presidential ruling violated the principle of separation of powers. They won; Truman and his argument deriving authority from the inherent presidential power and also as Commander and Chief failed.
The the Court felt that Truman's role as executive required him to faithfully execute the law (This is clearly gonna be important to the case against Bush). There were no laws that authorized Truman such power and so his order violated that. Moreover (and this is also gonna be important to the case against Bush)), the decision also determined that Truman's order amounted to making law, an authority not constitutionally granted to the presidency. The Court felt this violated the principle of separation of powers. He should have asked for a law providing the authority.
They felt that his claim of authority to take control of he steel industry under Commander and Chief authority was not credible, after all else it was an effort to control a strike not wage war, although (and this may be important to Bush's supporters) they left open the notion that a theater of war (remember the actual fighting was in Korea) might include the United States.
But, (and this seems important to the case against Bush) they felt that Commander and Chief authority did not extend to seizing property which is protected against by the Fourth Amendment (which just happens to also protect our lives from guess what--unwarranted surveillance).