i mean, you referred to lopez and morrison, and nfib. to my knowledge, those are the only three cases the supreme court has decided since its ruling in 1937 on nlrb vs. jones, which essentially created the modern substantial effects case, the modern substantial effects standard. those are the only three instances in which the supreme court identified, as outside the commerce clause authority, something that congress had enacted. are these meaningful constraints in your view, or are they examples of congress just getting reckless and sloppy in the way it drafted things? some have argued, for instance, that as long as congress doesn't get reckless and sloppy, it can do whatever it wants under those. do you have any view on that? >> well, these cases come through the courts, so i'll be general. the fact that congress is limited in its authority under the commerce clause is established law. it is a fundamental principle of our constitutional order, and those limits that the supreme court has recognized do carve out categories of activity tha