The power of the Supreme Court to declare a law unconstitutional is an example of which of the following principles?

Republicanism refers to a political ideology centered on the concept of a republic, where representatives are elected to govern on behalf of the people. While the Supreme Court operates within a republican framework, this principle does not specifically address the judiciary's role in reviewing laws, making it less relevant to the question.

Federalism is the distribution of power between national and state governments. While this principle is crucial for understanding the structure of American governance, it does not pertain to the specific function of the Supreme Court in reviewing the constitutionality of laws, which is a matter of judicial authority rather than intergovernmental relations.

Laissez-faire is an economic philosophy advocating for minimal government intervention in the economy. This principle primarily concerns economic practices and does not relate to the judiciary's role in evaluating laws for constitutional compliance. Thus, it does not apply to the context of judicial review.