Fred M. Vinson,
Memphis Steam Laundry Cleaner v…
“ To sum up, we hold that the tax before us infringes the Commerce Clause under either interpretation of the operating incidence of the tax. The Commerce Clause created the nation-wide area of free trade essential to this country's economic welfare by removing state lines as impediments to intercourse between the states. [16] The tax imposed in this case made the Mississippi state line into a local obstruction to the flow of interstate commerce that cannot stand under the Commerce Clause. ”
