Which entity plays the largest role in interpreting the Bill of Rights?

The Supreme Court plays the largest role in interpreting the Bill of Rights because it is the highest court in the United States and has the authority to make final judicial decisions on constitutional issues. The Court's interpretations of the Bill of Rights are essential for understanding how these rights are applied in practice. Through various landmark rulings, the Supreme Court has defined the scope and limits of individual rights, such as free speech, the right to bear arms, and protections against unreasonable searches and seizures.

While Congress and state legislatures can create laws that align with or expand upon the rights established in the Bill of Rights, they cannot constitutionally override the court's interpretations. The executive branch is also bound by these interpretations and does not have the authority to alter them. Therefore, the centralized judicial leadership of the Supreme Court is crucial in mediating disputes and clarifying how the Bill of Rights protects American citizens' liberties.