A high school student in San Antonio, Texas, who brought an unloaded handgun to school was charged with violating the Gun-Free School Zones Act of 1990. The student challenged the charge, claiming that Congress did not have the power to override state law within public schools. In the 1995 case United States v. Lopez, the Supreme Court ruled that Congress did not have the power to regulate public schools. Instead, the Court found that that power belonged to individual states. Explain which constitutional principle this scenario illustrates. What evidence led you to that conclusion

The answer is "Federalism "

Explanation:

The wording of this question represents the federalism principle. Its constitutional notion of federalism states that the US is an eternal union of individual countries, that it only grants the federal central government some specified responsibilities willingly.

The Constitution says that only those powers mentioned in the constitution are conferred to the administration. These are all the powers each region has presented to the national govt.

The nations are left with everything. One of the things that states are left with is to govern school systems.