Did congress have an exclusive right to
regulate interstate
commerce or was this
a "concurrent" power
to be shared with the
states?

Concurrent powers include regulating elections, taxing, borrowing money and establishing courts. In the Commerce Clause, the Constitution gives the national government broad power to regulate Commerce with foreign Nations, several States and Indian tribes.

Explanation:

I hope this helped and you had a great thanksgiving!

people can eat food during that time