Defenders of Bush in the matter of the NSA warrantless spying and other matters of deference to executive power like to say that the Constitution fully empowers Bush to use the military in whatever way he deems necessary to defend the United States. He can ignore any Congressional restrictions on military activity (such as NSA snooping) because Congress doesn't have the authority to limit his role as Commander in Chief.
Well, I seem to recall that back in 1993 the Republicans were threatening to pass legislation that would make it impossible for Clinton to fulfill his promise to lift the ban on homosexuals in the military. Wouldn't that qualify as an un-Constitutional interference in the use of the military by the Legislative branch?