Which principle regarding laws does the Judicial Branch uphold in the U.S. government?

The Judicial Branch of the U.S. government primarily functions to interpret and apply the law, with a significant role in determining the constitutionality of those laws. This principle embodies the concept of judicial review, which allows courts to assess whether legislative and executive actions comply with the Constitution. If a law is found to be in conflict with the Constitution, the Judicial Branch has the authority to rule that law unconstitutional, which underscores the system of checks and balances designed to prevent any one branch of government from exercising unchecked power.

This interpretation is crucial for maintaining the rule of law and ensuring that individual rights are protected. The responsibility of the Judicial Branch in this context is not to create or change laws, but rather to evaluate the laws passed by the legislative branch and the actions taken by the executive branch against the Constitution.