Congress's commerce power is Congress's power to regulate commerce. This means regulating the items, instrumentalities, and systems of interstate commerce.

The power to tax, to regulate interstate commerce, and to regulate foreign commerce.

The Commerce Power

The Interstate Commerce Clause may be found in Article I, Section 8:

"...To regulate commerce with foreign nations, and among the several states, and with the Indian tribes;"

This provision gives the nations government the power to regulate interstate commerce.

It is a reserved power.