Joseph P. Bradley, Leloup v. Port of Mobile — Opinion of the Court
“ Of course, the exaction of a license tax as a condition of doing any particular business is a tax on the occupation; and a tax on the occupation of doing a business is surely a tax on the business. Now, we have decided that communication by telegraph is commerce, as well as in the nature of postal service, and, if carried on between different states, it is commerce among the several states, and directly within the power of regulation conferred upon congress, and free from the control of state regulations, except such as are strictly of a police character. ”
