Final answer:
Under the US Constitution, Congress has the power to regulate interstate commerce.
Step-by-step explanation:
Under the US Constitution, Congress has the power to regulate interstate commerce. This power is derived from the Commerce Clause in Article I, Section 8 of the Constitution, which grants Congress the authority to regulate commerce among the states. Over time, the Supreme Court has interpreted this clause broadly, allowing Congress to regulate various types of economic activities that impact interstate commerce.