Congress may regulate under its commerce power:1.The use of the channels of interstate commerce.2.The instrumentalities of interstate commerce, or persons or things in interstate commerce.3.Activities that have a substantial relation to interstate commerce. Factors to consider... (1) Whether the activity was non-economic as opposed to economic activity; previous cases involved economic activity. (2) Jurisdictional element: whether the good had moved in interstate commerce. (3) Whether there had been Congressional findings of an economic link with the regulated activity. (4) How attenuated the link was between the regulated activity and interstate commerce.