 Congress passes a law regulating the wholesale retail prices of "every purchase or sale of oil, natural gas, and electric power made in the United States." The strongest argument in support of the constitutionality of this statute is that
the Constitution expressly empowers Congress to enact laws for "the general welfare."  Congress has the authority to regulate such products' interstate transportation and importation from abroad. Congress may regulate the prices of every purchase and sale of goods and services made in this country, because commerce includes buying and selling.  in inseverable aggregates, the domestic purchases or sales of such products affect interstate or foreign commerce