rad law wrote:What is the difference between regulation and commandeering? If there is a difference, I don't see it. Maybe because I am an idiot.
Look at New York v. United States. Its the best example I can think of because congress set out 3 things that regulated toxic waste, but only the last (take care provision requiring states to take title to the stuff) was unconstitutional under the 10th Amendment.
I can see where the confusion comes from, but as long as Congress isn't explicitly telling the state legislature (or state officials) to do something under a federal guideline, it is probably ok.
For example: Compare Printz v. United States where Congress told the chief law enforcement officer of each county to run background checks for gun purchases (and SC struck it down) to a hypothetical ban on interstate gun sales that don't have certain documentation. I think the 2nd one would be ok even if local cops often enforced the law because congress isn't mandating it.
Someone make sure I'm not making crap up?
EDIT: In any event, a commandeer question will almost certainly be an "argue both sides" kind of thing. Fact that show explicit direction from congress = bad for law. Facts that show incentives or voluntary enforcement by state officials = good for law.