What power
does the Commerce Clause give the national government?

Commerce clause, provision of the U.S. Constitution

that authorizes Congress “to regulate Commerce with foreign Nations, and among the several States, and with Indian Tribes.” The commerce clause has traditionally been interpreted both as a grant of positive authority to Congress and as an implied prohibition of state laws and regulations that interfere with or discriminate against interstate commerce

answer; the period of time known as the middle ages;