Rufus Wheeler Peckham, Western Union Telephone Company v…
“ Can it be said that the imposition of a penalty for the violation of a duty which the company owed by the general law of the land is a regulation of or an obstruction to interstate commerce within the meaning of that clause of the federal constitution under discussion? We think not. No tax is laid upon any interstate message, nor is there any regulation of a nature calculated to at all embarrass, obstruct, or impede the company in the full and fair performance of its duty as an interstate sender of messages. ”
