U.S. courts apply the strict scrutiny standard in two contexts: • when a fundamental constitutional right is infringed, particularly those found in the
Bill of Rights and those the court has deemed a
fundamental right protected by the
Due Process Clause or "liberty clause" of the
14th Amendment, or • when a government action applies to a "
suspect classification", such as
race or
national origin. To satisfy the strict scrutiny standard, the law or policy must: • be justified by a
compelling governmental interest. While the Courts have never
brightly defined how to determine if an interest is compelling, the concept generally refers to something necessary or crucial, as opposed to something merely preferred. Examples include national security, preserving the lives of a large number of individuals, and not violating explicit constitutional protections. • be
narrowly tailored to achieve that goal or interest. If the government action encompasses too much (is
overbroad) or fails to address essential aspects of the compelling interest, then the rule is not considered narrowly tailored. • be the least restrictive means for achieving that interest: there must not be a less restrictive way to effectively achieve the compelling government interest. The test will be met even if there is another method that is equally the least restrictive. Some legal scholars consider this "least restrictive means" requirement part of being narrowly tailored, but the Court generally evaluates it separately. Legal scholars, including judges and professors, often say that strict scrutiny is "strict in theory, fatal in fact", since popular perception is that most laws subjected to the standard are struck down.
Sandra Day O'Connor explicitly denied this in
Adarand Constructors, Inc. v. Peña in 1995, and an empirical study of strict scrutiny decisions in the federal courts found that laws survive strict scrutiny more than 30% of the time. In one area of law,
religious liberty, laws that burden religious liberty survived strict scrutiny review in nearly 60% of cases; however, a discrepancy was found in the type of religious liberty claim, with most claims for exemption from law failing and no allegedly discriminatory laws surviving.
Harvard law professor Richard Fallon Jr. has written that rather than being neatly applied, under strict scrutiny, "interpretation is more varied than is often recognized", a view that has been acknowledged by U.S.
Supreme Court Justice
Clarence Thomas (e.g., in his dissent (part III) in
Hellerstedt). The compelling state interest test is distinguishable from the
rational basis test, which involves claims that do not involve a suspect class or
fundamental right, but still arise under the
Equal Protection Clause or
Due Process Clause. A
presumption of constitutionality does not apply under
strict scrutiny: the burden to prove the constitutionality of a law shifts to the government lawyers. ==Suspect classification==