What is the fundamental principle underlying the concept of judicial review?

The fundamental principle underlying judicial review is the idea of the separation of powers and the concept of constitutional supremacy. The separation of powers, established by the U.S. Constitution, divides governmental authority among three distinct branches: the legislative (Congress), the executive (President), and the judicial (courts). Each branch has specific powers and responsibilities, designed to prevent any one branch from becoming too powerful. Judicial review is the power of the judiciary, particularly the Supreme Court, to examine laws and actions of the legislative and executive branches and determine whether they are constitutional. Constitutional supr....