Morrison Waite,
Pensacola Telegraph Company v. Western Union Telegraph Company…
“ It is not only important to the people, but to the government. By means of it the heads of the departments in Washington are kept in close communication with all their various agencies at home and abroad, and can know at almost any hour, by inquiry, what is transpiring any where that affects the interest they have in charge. Under such circumstances, it cannot for a moment be doubted that this powerful agency of commerce and intercommunication comes within the controlling power of Congress, certainly as against hostile State legislation. ”
