Commerce Power Law and Legal Definition
Commerce power means the power of Congress to regulate foreign commerce, interstate commerce, and commerce with Native American tribes in the U.S. It is the power to regulate; that is, to prescribe the rule by which commerce is to be governed. It also includes the authority to regulate navigation. Hence, Congress has jurisdiction over all navigable waters of the U.S. This power may be extended to nonnavigable waterways and tributaries if the navigable capacity of the navigable waterway or interstate commerce is affected.