Commerce Clause

The part of the US Constitution that gives Congress the power to regulate interstate and foreign commerce. The US Constitution under Article I, Section 8, Clause 3 gives Congress the power "to regulate commerce with foreign Nations, and among several States and with the Indian Tribes".  Commerce among the states is business in all forms between citizens of different states. It may include communication by telegraph, telephone, radio or the movement of persons from one state to another for any reason, including pleasure. Commerce with foreign nations is business between US Citizens and subjects of foreign government that occurs outside the US. Intrastate or domestic commerce does not move across state lines. It is exclusively controlled by the state.