When is a strict-scrutiny standard used to examine laws, how is this standard applied, and what presumption do courts apply, if any, in cases involving this standard?

If a law prevents individuals from exercising a fundamental right, or if the law's classification scheme involves suspect classifications, the action will be subject to strict scrutiny. Suspect classifications include classifications based on race, national origin, and citizenship. Courts uphold suspect classifications only if they are necessary to promote a compelling state interest. In cases involving suspect classifications, courts do not begin their analysis with a presumption that the classification is constitutional, so few laws pass the strict-scrutiny standard.