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, emphasizing representative democracy and the rule of law. While it is foundational to the structure of the government, it does not specifically address the judicial branch's power to review and invalidate laws, which is a function of checks and balances.

Federalism is the distribution of power between national and state governments. While it plays a significant role in the organization of government, it does not pertain directly to the Supreme Court's ability to assess the constitutionality of laws. This principle focuses more on the division of authority rather than the interaction between branches.

Laissez-faire refers to an economic philosophy advocating minimal government intervention in the economy. It does not relate to the judicial process or the powers of the Supreme Court in relation to legislation, making it irrelevant to the context of declaring laws unconstitutional.