Answer:
This clause states that the United States Congress shall have power
•To regulate Commerce with foreign Nations, and
• To regulate commerce among the several States,
• and to regulate commerce with the Indian Tribes.
Explanation:
The Commerce Clause describes an enumerated power listed in the United States Constitution (Article I, Section 8, Clause 3). The clause states that the United States Congress shall have power "[t]o regulate Commerce with foreign Nations, and among the several States, and with the Indian Tribes."
The framers believe the clause was necessary so as to make"normal" or "regular" commerce between different state; hence, it was designed to further promote trade and exchange and not to limit, hinder or restrict it.
Also, it was necessary so as to aim at preventing states from enacting obstructions and restraints to the free flow of "commerce" such as quotas and taxes, and tariffs.
