I think Rehnquist would agree with you. In *Lopez * he tried to import a commercial requirement into the test:
The Act neither regulates a commercial activity nor contains a requirement that the possession be connected in any way to interstate commerce. We hold that the Act exceeds the authority of Congress “[t]o regulate Commerce . . . among the several States . . . .”
Which implies that the commerce clause automatically allows regulation of commercial activity.
It cannot, therefore, be sustained under our cases upholding regulations of activities that arise out of or are connected with a [ UNITED STATES v. LOPEZ, ___ U.S. ___ (1995) , 13] commercial transaction, which viewed in the aggregate, substantially affects interstate commerce.
Which suggests that not all commercial transactions may be regulated because they must also substantially affect interstate commerce. But it appears to be a requirement.
We do not doubt that Congress has authority under the Commerce Clause to regulate numerous commercial activities that substantially affect interstate commerce and also affect the educational process.
Here, again, it appears they must both be present.
While we are in here, he also says some interesting things about certainty and the Commerce Clause:
Admittedly, a determination whether an intrastate activity is commercial or noncommercial may in some cases result in legal uncertainty. But, so long as Congress’ authority is limited to those powers enumerated in the Constitution, and so long as those enumerated powers are interpreted as having judicially enforceable outer limits, congressional legislation under the Commerce Clause always will engender “legal uncertainty.”
He is saying that you can’t really get the answer by looking at the legal standards or the text. Isn’t he?
The Constitution mandates this uncertainty by withholding from Congress a plenary police power that would authorize enactment of every type of legislation. See U.S. Const., Art. I, 8. Congress has operated within this framework of legal uncertainty ever since this Court determined that it was the judiciary’s duty “to say what the law is.” Marbury v. Madison, 1 Cranch. 137, 177 (1803) (Marshall, C. J.). Any possible benefit from eliminating this “legal uncertainty” would be at the expense of the Constitution’s system of enumerated powers.
Looks like he saying the interpretation of the text is uncertain.
[T]he question of congressional power under the Commerce Clause "is necessarily one of degree…These are not precise formulations, and in the nature of things they cannot be.
Yep.
Now in Morrison Rehnquist again wrote the opinion. And he picked up where he left off in Lopez:
[A] fair reading of Lopez shows that the noneconomic, criminal nature of the conduct at issue was central to our decision in that case. See, e.g., id., at 551 (“The Act [does not] regulat[e] a commercial activity”). . . ("Admittedly, a determination whether an intrastate activity is commercial or noncommercial may in some cases result in legal uncertainty. . . . "), 567; see also id., at 573-574 (Kennedy, J., concurring) (stating that Lopez did not alter our “practical conception of commercial regulation” and that Congress may “regulate in the commercial sphere on the assumption that we have a single market and a unified purpose to build a stable national economy”), 577 (“Were the Federal Government to take over the regulation of entire areas of traditional state concern, areas having nothing to do with the regulation of commercial activities, the boundaries between the spheres of federal and state authority would blur”), 580 (“nlike the earlier cases to come before the Court here neither the actors nor their conduct has a commercial character, and neither the purposes nor the design of the statute has an evident commercial nexus. The statute makes the simple possession of a gun within 1,000 feet of the grounds of the school a criminal offense. In a sense any conduct in this interdependent world of ours has an ultimate commercial originor consequence, but we have not yet said the commerce power may reach so far” (citation omitted)). Lopez’s review of Commerce Clause case law demonstrates that in those cases where we have sustained federal regulation of intrastate activity based upon the activity’s substantial effects on interstate commerce, the activity in question has been some sort of economic endeavor. See id., at 559-560.
Hey, look what I found. And right where I left it.
The dissent picked right up on it:
This new characterization of substantial effects has no support in our cases (the self-fulfilling prophecies of Lopez aside), least of all those the majority cites.
Hey, Rehnquist is planting quotes and trying to do what Brennan did in Burger King!
Obviously, it would not be inconsistent with the text of the Commerce Clause itself to declare “noncommercial” primary activity beyond or presumptively beyond the scope of the commerce power. That variant of categorical approach is not, however, the sole textually permissible way of defining the scope of the Commerce Clause, and any such neat limitation would at least be suspect in the light of the final sentence of Article I, §8, authorizing Congress to make “all Laws … necessary and proper” to give effect to its enumerated powers such as commerce.
While we could read the commerce power as lnot including “noncommercial” activities, that does not give effect to the necessary and proper clause.
Obviously, it would not be inconsistent with the text of the Commerce Clause itself to declare “noncommercial” primary activity beyond or presumptively beyond the scope of the commerce power. That variant of categorical approach is not, however, the sole textually permissible way of defining the scope of the Commerce Clause, and any such neat limitation would at least be suspect in the light of the final sentence of Article I, §8, authorizing Congress to make “all Laws … necessary and proper” to give effect to its enumerated powers such as commerce.
We have tried to balance plenary power and categorical exclusions for a long time.
In the half century following the modern activation of the commerce power with passage of the Interstate Commerce Act in 1887, this Court from time to time created categorical enclaves beyond congressional reach by declaring such activities as “mining,” “production,” “manufacturing,” and union membership to be outside the definition of “commerce” and by limiting application of the effects test to “direct” rather than “indirect” commercial consequences.
We tried this approach.
And yet today’s decision can only be seen as a step toward recapturing the prior mistakes. Its revival of a distinction between commercial and noncommercial conduct is at odds with Wickard, which repudiated that analysis, and the enquiry into commercial purpose, first intimated by the Lopez concurrence, see Lopez, supra, at 580 (opinion of Kennedy, J.), is cousin to the intent-based analysis employed in Hammer, supra, at 271-272 but rejected for Commerce Clause purposes in Heart of Atlanta, supra, at 257 and Darby, supra, at 115.
So coming into the pot case we have Rehnquist reviving the commercial/non-commercial distinction. That distinction would have supported reversal in the pot case. But Rehnquist could not convince a majority of the Court to vote with him.
The majority quickly discarded the commercial/non-commercial distinction, re-establishing Wickard:
Wickard thus establishes that Congress can regulate purely intrastate activity that is not itself “commercial,” in that it is not produced for sale, if it concludes that failure to regulate that class of activity would undercut the regulation of the interstate market in that commodity.
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Moreover, even though Wickard was indeed a commercial farmer, the activity he was engaged in–the cultivation of wheat for home consumption–was not treated by the Court as part of his commercial farming operation.
Here is an article noticing that Rehnquist is losing more on Federalism cases, including this one.