Any one citizen in Virginia forced to participate in Commerce against their will is an injured party, which actually is a contradiction of "regulation of commerce" for this reason: a regulation of commerce among the states is to set rules for how the buying and selling of goods will be maintained across state boundaries. The power granted to Congress is to protect the nation from exclusionary practices among the states. An imperative to buy a particular good is the same as saying you cannot be without a particular good, which is in effect a prohibition rather than a regulation. These are two totally different powers; one of which Congress does not have.