24. Which of the following provisions provides the strongest basis for Congress's authority to enact this statute?

The Supreme Court has made it clear that the power of Congress to regulate commerce, although very broad, does have limits. To be within Congress's power under the Commerce Clause, a federal law must regulate one of four categories: (i) channels of interstate commerce; (ii) instrumentalities of interstate commerce and persons and things in interstate commerce; (iii) articles moving in interstate commerce; or (iv) activities that have a substantial effect on interstate commerce.

The Court will uphold a regulation of intrastate activities if it is an economic or commercial activity and if it can conceive of a rational basis on which Congress could conclude that the activity, in aggregate, substantially affects interstate commerce. Gonzales v. Raich, 545 U.S. 1 (2005).

The Fourteenth Amendment prohibits states (not the federal government or private persons) from depriving any person of life, liberty, or property without due process and equal protection of the law. The Enforcement Clause of the Fourteenth Amendment states: «The Congress shall have power to enforce, by appropriate legislation, the provisions of this article.»

Article IV, Section 2, the Interstate Privileges and Immunities Clause, provides that «[t]he Citizens of each state shall be entitled to all Privileges and Immunities of citizens in the several states.» Thus, it prohibits discrimination by a state against non-residents.

Congress may spend for the general welfare, it may tax for the general welfare, but it may not regulate for the general welfare. See Article I, Section 8; United States v. Butler, 297 U.S. 1 (1936). For this reason, a congressional regulatory scheme has to be justified as a reasonable means of carrying out some other enumerated power, typically the commerce power.

C is correct. Under Article I, Section 8, Clause 3, Congress has plenary power to regulate commercial activity involving two or more states. An activity that occurs intrastate means it is entirely contained within a single state. An intrastate regulation will be still upheld, however, if it is an economic or commercial activity and there is a rational basis on which Congress could have decided that the activity, in aggregate, substantially affects interstate commerce. Gonzales v. Raich, 545 U.S. 1 (2005). In this case, the statute regulating the rental terms for residential property, although it may occur intrastate on a transactional basis, constitutes economic activity that, in the aggregate, has a substantial effect on interstate commerce. Therefore, the best basis for the statute's constitutionality is the Commerce Clause.

A is incorrect. The Fourteenth Amendment is not a prohibition on actions by the federal government, but rather, on the states. Therefore, the Enforcement Clause applies only to congressional regulation of state action, and would not be a basis for upholding the constitutionality of the federal statute in this case, which also applies to private individuals and entities.

B is incorrect. The Privileges and Immunities Clause of Article IV forbids certain types of discrimination by states against the citizens of other states or non-residents. It is not a source of federal congressional power and is therefore inapplicable here.

D is incorrect. The General Welfare Clause gives Congress the authority to tax and spend in service of the general welfare. It is not a proper basis for arguing that this statute is constitutional because it does not regulate taxation or spending.