Equal Protection and Levels of Scrutiny

The Three Tiers and Which Classifications Trigger Each

Equal protection analysis is mechanical once you correctly classify the law. The Equal Protection Clause of the Fourteenth Amendment applies to the states; the Fifth Amendment's Due Process Clause imposes an equivalent equal-protection component on the federal government (Bolling v. Sharpe). Three tiers:

For gender, the Court demands an 'exceedingly persuasive justification' (United States v. Virginia — VMI); the justification must be genuine, not invented post hoc, and may not rely on overbroad stereotypes. Alienage is tricky: state discrimination against aliens generally gets strict scrutiny, but the political-function exception drops it to rational basis when the position involves self-government (police officers, teachers, jurors), and federal alienage classifications get only rational basis because of the federal immigration power.

The Intent Requirement and Facially Neutral Laws

A law can be discriminatory in three ways: (1) facially, by classifying on its face; (2) in its application, where a neutral law is administered in a discriminatory way (Yick Wo v. Hopkins); or (3) in impact, where a neutral law disproportionately burdens a protected group.

The critical rule: a facially neutral law with a disproportionate impact receives heightened scrutiny only if the challenger proves discriminatory purpose or intent — disparate impact alone is not enough. Washington v. Davis (1976) upheld a police-department literacy test that disproportionately excluded Black applicants because no intent to discriminate was shown; only rational-basis review applied. Village of Arlington Heights lists factors for inferring intent (historical background, sequence of events, departures from normal procedure, legislative history).

This is one of the most heavily tested constitutional rules: when an MBE fact pattern gives you a neutral statute that happens to burden a minority group, look for evidence of intent; if there is none, the answer is rational basis (and the law usually survives).

Affirmative action. Race-conscious government action — even benign or remedial — triggers strict scrutiny. In Students for Fair Admissions v. Harvard (2023), the Court held that race-based affirmative action in university admissions violates equal protection, effectively ending the diversity rationale for racial preferences in admissions. Remedying the government's own specific past discrimination remains a compelling interest, but general societal discrimination does not justify racial classifications.

Fundamental-Rights Equal Protection and Exam Mechanics

Equal protection also applies strict scrutiny when a law unequally distributes a fundamental right. The fundamental rights for this purpose include voting (one person, one vote; ballot access; restrictions on the franchise), interstate travel (durational residency requirements that penalize migration — Shapiro v. Thompson, Saenz v. Roe), and access to the courts for fundamental matters.

Note that some interests are fundamental for due process but not for equal protection purposes, and vice versa; education and welfare are not fundamental, so wealth-based disparities in school funding get only rational basis (San Antonio v. Rodriguez).

A reliable essay structure for any equal protection question:

1. Identify the classification — who is treated differently from whom?
2. Determine the trigger — is the classification suspect/quasi-suspect, or does the law burden a fundamental right? For facially neutral laws, require intent + impact.
3. State the tier and standard verbatim (necessary/compelling; substantially related/important; rationally related/legitimate).
4. Apply the standard to the facts, allocating the burden of proof to the correct party.

A recurring trap: rational-basis-with-bite. In a handful of cases the Court has invalidated laws under nominal rational basis where animus toward an unpopular group was the only apparent purpose (Romer v. Evans; U.S. Department of Agriculture v. Moreno) — 'a bare desire to harm a politically unpopular group' is not a legitimate interest. Spot this when the only conceivable rationale for a classification is hostility toward the burdened group.

Suspect-Class Edge Cases and Common Errors

Several classifications generate predictable confusion. Alienage is the trap of traps: state laws discriminating against lawfully present aliens normally get strict scrutiny, but the political-function exception lowers review to rational basis when the job involves participation in democratic self-government (police officers, public-school teachers, probation officers, jurors), and federal alienage rules get rational basis because immigration is a federal power. Age and disability are not suspect or quasi-suspect —

they receive rational basis, which is why mandatory-retirement and many disability classifications survive. Wealth and poverty are likewise not suspect classes. Sexual orientation has not been formally declared suspect by the Supreme Court;

the Court has invalidated anti-gay measures using rational basis (often 'with bite') and the fundamental-right-to-marry analysis (Obergefell) rather than announcing a new suspect class.

Three recurring mistakes sink exam answers. First, applying heightened scrutiny to a facially neutral law without finding intent; Washington v. Davis requires both discriminatory purpose and effect, so disparate impact alone yields rational basis. Second, forgetting that benign or remedial racial classifications still get strict scrutiny — there is no relaxed tier for 'good' racial line-drawing, and Students for Fair Admissions confirms how demanding that scrutiny is.

Third, conflating the tiers' verbal formulas: keep 'necessary/compelling' (strict), 'substantially related/important' with an 'exceedingly persuasive justification' for gender (intermediate), and 'rationally related/legitimate' (rational basis) crisply distinct, and always assign the burden of proof to the government in the two heightened tiers and to the challenger under rational basis.