<P> Thus, Ogden contended, Congress could not invalidate his monopoly as long as he only transported passengers within New York . The Supreme Court, however, found that Congress could invalidate his monopoly since it was operational on an interstate channel of navigation . </P> <P> In its decision, the Court assumed interstate commerce required movement of the subject of regulation across state borders . The decision contains the following principles, some of which have since been altered by subsequent decisions: </P> <Ul> <Li> Commerce is "intercourse, all its branches, and is regulated by prescribing rules for carrying on that intercourse ." </Li> <Li> Commerce among the states cannot stop at the external boundary - line of each state, but may be introduced into the interior...Comprehensive as the word "among" is, it may very properly be restricted to that commerce which concerns more states than one ." </Li> <Li> The Commerce power is the power to regulate, that is "to prescribe the rule by which commerce is to be governed" which "may be exercised to its utmost extent, and acknowledges no limitations other than are prescribed in the Constitution ." </Li> </Ul> <Li> Commerce is "intercourse, all its branches, and is regulated by prescribing rules for carrying on that intercourse ." </Li>

Who has the power to regulate interstate commerce