The Interstate Commerce Clause calls upon Congress "to regulate commerce ... among the several States. But in the Wickard v. Filbert case we saw that a farmer was prohibited from selling wheat to neighbors within his own state. The Court said this was permitted because: A. Even though he did not sell his wheat interstate, his own local sale and/or use of it might reduce the amount of wheat that would be sold in interstate commerce and therefore, since there could be a substantial effect on interstate commerce, the sale could be banned even though it was inside one state. B. Even though he did not sell his wheat interstate, he was clearly trying to undermine Congress and Congress never has to put up with that sort of thing The Court said that the wheat was being used by the farmers to whom he sold it to feed their livestock that was being traded in interstate commerce