Whether intellectual disability is a quasi-suspect classification requiring heightened equal-protection scrutiny.
Holding
No. Classifications based on intellectual disability are generally reviewed under rational-basis review, not heightened scrutiny.
Reasoning
The usual equal-protection rule presumes that social and economic legislation is constitutional if its classification is rationally related to a legitimate governmental interest. More demanding review applies when classifications such as race, national origin, alienage, gender, or illegitimacy ordinarily bear little relationship to legitimate governmental objectives, or when a law burdens a fundamental constitutional right.
Intellectual disability differs from those classifications because it may be relevant to legitimate governmental decisions. People with intellectual disabilities have varying abilities and needs, and governments may properly account for those differences in providing education, care, habilitation, supervision, and other services. Designing such measures is often technical and individualized, making broad judicial second-guessing especially inappropriate.
Federal and state legislation also showed that lawmakers were actively responding to the needs of people with intellectual disabilities rather than consistently acting from hostility or antipathy. The Court reasoned that heightened scrutiny could discourage beneficial programs that necessarily distinguish among people according to their differing capacities and needs.
The Court rejected the proposition that people with intellectual disabilities were politically powerless in the constitutional sense. Although they are a minority and have historically suffered discrimination, recent protective legislation demonstrated an ability to attract legislative attention and support. Treating this group as quasi-suspect would also make it difficult to distinguish other large groups defined by disability, age, illness, or infirmity.
Rational-basis review still prohibits arbitrary classifications. A law must rationally serve a legitimate purpose, and a bare desire to harm or disadvantage a politically unpopular group is not a legitimate governmental objective.