The Supreme Court plays a very important role in our constitutional system of government. First, as the highest court in the land, it is the court of last resort for those looking for justice. ... Third, it protects civil rights and liberties by striking down laws that violate the Constitution. Congress was established to make laws, while the president's main function is to enforce those laws. It is up to the third branch of government, the judiciary, led by the Supreme Court, to interpret those laws.