According to a well-known principle of constitutional interpretation here identified as the “internal-limits canon,” the powers of Congress must always be construed as authorizing less legislation than a general police power would. This Article argues that the internallimits canon is unsound. Whether the powers of Congress would in practice authorize any legislation that a police power would authorize is a matter of contingency: it depends on the relationship between the powers and the social world at a given time. There is no reason why, at a given time, the powers cannot turn out to authorize any legislation that a police power would. This Article explains why setting aside the internal-limits canon is consistent with the interests of federalism, with fidelity to the Founding design, and with the text of the Constitution.
Primus, Richard A. "The Limits of Enumeration." Yale L. J. 124, no. 3 (2014): 576-642.