More from Lopez on how they decided what is, and is not Congress's power under the Commerce Clause, there is no mention of a requirment that the gun simply moved interstate, but required it's economic impact. (note the addition of the "magic words" is secondary to the fact that the law itself is a criminal statue, not intended to regulate commerce, but crime = fail);
we have identified three broad categories of activity that Congress may regulate under its commerce power. Perez v. United States, supra, at 150; see also Hodel v. Virginia Surface Mining & Reclamation Assn., supra, at 276-277. First, Congress may regulate the use of the channels of interstate commerce. See, e.g., Darby, 312 U. S., at 114; Heart of Atlanta Motel, supra, at 256 (" `[T]he authority of Congress to keep the channels of interstate commerce free from immoral and injurious uses has been frequently sustained, and is no longer open to question.' " (quoting Caminetti v. United States, 242 U.S. 470, 491 (1917)). Second, Congress is empowered to regulate and protect the instrumentalities of interstate commerce, or persons or things in interstate commerce, even though the threat may come only from intrastate activities. See, e.g., Shreveport Rate Cases, 234 U.S. 342 (1914); Southern R. Co. v. United States, 222 U.S. 20 (1911) (upholding amendments to Safety Appliance Act as applied to vehicles used in intrastate commerce); Perez, supra, at 150 ("[F]or example, the destruction of an aircraft (18 U.S.C. § 32), or . . . thefts from interstate shipments (18 U.S.C. § 659)"). Finally, Congress' commerce authority includes the power to regulate those activities having a substantial relation to interstate commerce, Jones & Laughlin Steel, 301 U. S., at 37, i.e., those activities that substantially affect interstate commerce. Wirtz, supra, at 196, n. 27.
Within this final category, admittedly, our case law has not been clear whether an activity must "affect" or "substantially affect" interstate commerce in order to be within Congress' power to regulate it under the Commerce Clause. Compare Preseault v. ICC, 494 U.S. 1, 17 (1990), with Wirtz, supra, at 196, n. 27 (the Court has never declared that "Congress may use a relatively trivial impact on commerce as an excuse for broad general regulation of state or private activities"). We conclude, consistent with the great weight of our case law, that the proper test requires an analysis of whether the regulated activity "substantially affects" interstate commerce.
We now turn to consider the power of Congress, in the light of this framework, to enact §922(q). The first two categories of authority may be quickly disposed of: §922(q) is not a regulation of the use of the channels of interstate commerce, nor is it an attempt to prohibit the interstate transportation of a commodity through the channels of commerce; nor can §922(q) be justified as a regulation by which Congress has sought to protect an instrumentality of interstate commerce or a thing in interstate commerce. Thus, if §922(q) is to be sustained, it must be under the third category as a regulation of an activity that substantially affects interstate commerce.
First, we have upheld a wide variety of congressional Acts regulating intrastate economic activity where we have concluded that the activity substantially affected interstate commerce. Examples include the regulation of intrastate coal mining; Hodel, supra, intrastate extortionate credit transactions, Perez, supra, restaurants utilizing substantial interstate supplies, McClung, supra, inns and hotels catering to interstate guests, Heart of Atlanta Motel, supra, and production and consumption of home grown wheat, Wickard v. Filburn, 317 U.S. 111 (1942). These examples are by no means exhaustive, but the pattern is clear. Where economic activity substantially affects interstate commerce, legislation regulating that activity will be sustained.
Even Wickard, which is perhaps the most far reaching example of Commerce Clause authority over intrastate activity, involved economic activity in a way that the possession of a gun in a school zone does not. Roscoe Filburn operated a small farm in Ohio, on which, in the year involved, he raised 23 acres of wheat. It was his practice to sow winter wheat in the fall, and after harvesting it in July to sell a portion of the crop, to feed part of it to poultry and livestock on the farm, to use some in making flour for home consumption, and to keep the remainder for seeding future crops. The Secretary of Agriculture assessed a penalty against him under the Agricultural Adjustment Act of 1938 because he harvested about 12 acres more wheat than his allotment under the Act permitted. The Act was designed to regulate the volume of wheat moving in interstate and foreign commerce in order to avoid surpluses and shortages, and concomitant fluctuation in wheat prices, which had previously obtained. The Court said, in an opinion sustaining the application of the Act to Filburn's activity:
"One of the primary purposes of the Act in question was to increase the market price of wheat and to that end to limit the volume thereof that could affect the market. It can hardly be denied that a factor of such volume and variability as home consumed wheat would have a substantial influence on price and market conditions. This may arise because being in marketable condition such wheat overhangs the market and, if induced by rising prices, tends to flow into the market and check price increases. But if we assume that it is never marketed, it supplies a need of the man who grew it which would otherwise be reflected by purchases in the open market. Home grown wheat in this sense competes with wheat in commerce." 317 U. S., at 128.
Section 922(q) is a criminal statute that by its terms has nothing to do with "commerce" or any sort of economic enterprise, however broadly one might define those terms. [n.3] Section 922(q) is not an essential part of a larger regulation of economic activity, in which the regulatory scheme could be undercut unless the intrastate activity were regulated. It cannot, therefore, be sustained under our cases upholding regulations of activities that arise out of or are connected with a commercial transaction, which viewed in the aggregate, substantially affects interstate commerce.
Second, §922(q) contains no jurisdictional element which would ensure, through case by case inquiry, that the firearm possession in question affects interstate commerce. For example, in United States v. Bass, 404 U.S. 336 (1971), the Court interpreted former 18 U.S.C. § 1202(a), which made it a crime for a felon to "receiv[e], posses, or transpor[t] in commerce or affecting commerce . . . any firearm." 404 U. S., at 337. The Court interpreted the possession component of §1202(a) to require an additional nexus to interstate commerce both because the statute was ambiguous and because "unless Congress conveys its purpose clearly, it will not be deemed to have significantly changed the federal state balance." Id., at 349. The Bass Court set aside the conviction because although the Government had demonstrated that Bass had possessed a firearm, it had failed "to show the requisite nexus with interstate commerce." Id., at 347. The Court thus interpreted the statute to reserve the constitutional question whether Congress could regulate, without more, the "mere possession" of firearms. See id., at 339, n. 4; see also United States v. Five Gambling Devices, 346 U.S. 441, 448 (1953) (plurality opinion) ("The principle is old and deeply imbedded in our jurisprudence that this Court will construe a statute in a manner that requires decision of serious constitutional questions only if the statutory language leaves no reasonable alternative"). Unlike the statute in Bass, §922(q) has no express jurisdictional element which might limit its reach to a discrete set of firearm possessions that additionally have an explicit connection with or effect on interstate commerce.
Although as part of our independent evaluation of constitutionality under the Commerce Clause we of course consider legislative findings, and indeed even congressional committee findings, regarding effect on interstate commerce, see, e.g., Preseault v. ICC, 494 U.S. 1, 17 (1990), the Government concedes that "[n]either the statute nor its legislative history contain express congressional findings regarding the effects upon interstate commerce of gun possession in a school zone." Brief for United States 5-6. We agree with the Government that Congress normally is not required to make formal findings as to the substantial burdens that an activity has on interstate commerce. See McClung, 379 U. S., at 304; see also Perez, 402 U. S., at 156 ("Congress need [not] make particularized findings in order to legislate"). But to the extent that congressional findings would enable us to evaluate the legislative judgment that the activity in question substantially affected interstate commerce, even though no such substantial effect was visible to the naked eye, they are lacking here. [n.4]
The Government argues that Congress has accumulated institutional expertise regarding the regulation of firearms through previous enactments. Cf. Fullilove v. Klutznick, 448 U.S. 448, 503 (1980) (Powell, J., concurring). We agree, however, with the Fifth Circuit that importation of previous findings to justify §922(q) is especially inappropriate here because the "prior federal enactments or Congressional findings [do not] speak to the subject matter of section 922(q) or its relationship to interstate commerce. Indeed, section 922(q) plows thoroughly new ground and represents a sharp break with the long standing pattern of federal firearms legislation." 2 F. 3d, at 1366.
The Government's essential contention, in fine, is that we may determine here that §922(q) is valid because possession of a firearm in a local school zone does indeed substantially affect interstate commerce. Brief for United States 17. The Government argues that possession of a firearm in a school zone may result in violent crime and that violent crime can be expected to affect the functioning of the national economy in two ways. First, the costs of violent crime are substantial, and, through the mechanism of insurance, those costs are spread throughout the population. See United States v. Evans, 928 F. 2d 858, 862 (CA9 1991). Second, violent crime reduces the willingness of individuals to travel to areas within the country that are perceived to be unsafe. Cf. Heart of Atlanta Motel, 379 U. S., at 253. The Government also argues that the presence of guns in schools poses a substantial threat to the educational process by threatening the learning environment. A handicapped educational process, in turn, will result in a less productive citizenry. That, in turn, would have an adverse effect on the Nation's economic well being. As a result, the Government argues that Congress could rationally have concluded that §922(q) substantially affects interstate commerce.
We pause to consider the implications of the Government's arguments. The Government admits, under its "costs of crime" reasoning, that Congress could regulate not only all violent crime, but all activities that might lead to violent crime, regardless of how tenuously they relate to interstate commerce. See Tr. of Oral Arg. 8-9. Similarly, under the Government's "national productivity" reasoning, Congress could regulate any activity that it found was related to the economic productivity of individual citizens: family law (including marriage, divorce, and child custody), for example. Under the theories that the Government presents in support of §922(q), it is difficult to perceive any limitation on federal power, even in areas such as criminal law enforcement or education where States historically have been sovereign. Thus, if we were to accept the Government's arguments, we are hard pressed to posit any activity by an individual that Congress is without power to regulate.
Although Justice Breyer argues that acceptance of the Government's rationales would not authorize a general federal police power, he is unable to identify any activity that the States may regulate but Congress may not. Justice Breyer posits that there might be some limitations on Congress' commerce power such as family law or certain aspects of education. Post, at 10-11. These suggested limitations, when viewed in light of the dissent's expansive analysis, are devoid of substance.