between what is truly national and what is truly local." 17 Independent states reasoning, I suppose. But the rule itself isn't specifically tied to the States as States, and so it fits more nearly with your enumerated powers model. The federalism rhetoric isn't necessary for or relevant to the result. So if this is a federalism revolution, it is a tame one indeed-though I worry that we've reached that conclusion by defining federalism so that almost no one is in favor of it. Loose talk of "police power" is disturbing, but very few federal statutes rest solely on aggregate economic effects analysis. Let me suggest something slightly different. Commerce Clause law before Lopez was hardly unambiguous. I think Eric Claeys's explanation of the New Deal cases is a good one. He argues that post-New Deal rational basis review was really a compromise between progressive reformers (who believed in unlimited congressional power) and the Supreme Court (which the public must perceive to be principled). 18 Professor Claeys describes the New Deal-era Supreme Court's "key innovation" as the modification of the substantial effects test in the NLRB v. Jones & Laughlin Steel 19 case: that case, he argues, "reversed the basic orientation of pre-1937 doctrine by reversing the direction of the 'effects' test. Roughly speaking, from Gibbons to the New Deal, the 'effects' test tried to maintain a principled line between interstate commerce and local activities" by permitting Congress to invoke the Necessary and Proper Clause and the Supremacy Clause to regulate intrastate activity "only after it was [already] clear the law's primary effect was to regulate interstate commerce." 20 The new substantial effects test, by contrast, permitted Congress to regulate nearly any activity, but "[b]ecause the test continued to distinguish between interstate commerce and local activities" in principle, "it preserved the idea that the Commerce Clause was one of several limited and enumerated powers." 21 I'm more sanguine, or perhaps less cynical, than Professor Claeys, but plainly Lopez and Morrison disambiguate the New Deal settlement that he aptly describes. So while Lopez and Morrison agitate some lawyers and law professors, they do not, without more, inject radical extratextual federalism principles into constitutional law. I'm not conceding that the decisions are correct, but it's clear to me that Lopez and Morrison don't disturb the core Commerce Clause precedents. The respondents in Gonzales v. Raich 22 relied on Lopez and Morrison to ask the Supreme Court to hold that the Controlled Substance Act's global criminal prohibition against marijuana was invalid as applied to intrastate, medical use of marijuana by terminally ill cancer patients. In his opinion for the Court, Justice Stevens stated that "[i]n their myopic focus, [respondents] overlook the larger context of modern-era Commerce Clause jurisprudence preserved by those cases." 23 Lopez and Morrison involved challenges alleging "that a particular statute or provision fell outside Congress'...