What type of cases must the Supreme Court avoid according to justiciability?

The Supreme Court is guided by the principle of justiciability, which refers to the limits on the types of matters that courts can adjudicate. Political questions are generally not considered justiciable because they involve issues that are more appropriately addressed by the legislative or executive branches rather than the judiciary. This includes cases that may require determining the constitutionality of a statute or action but where courts believe that resolution should remain within the political realm due to the nature of the question.

Moreover, moral dilemmas may involve subjective assessments and ethical considerations that do not lend themselves to judicial resolution. Courts avoid these cases to maintain their role as interpreters of the law rather than arbiters of moral or political disputes that require broader societal input.

By avoiding political questions and moral dilemmas, the Supreme Court ensures that it remains within its proper judicial function and does not overstep into areas where it lacks expertise or where resolution is best left to other branches of government. This preference upholds the separation of powers fundamental to the structure of the U.S. government.