Philip Pendleton Barbour,
New York v. Miln (36 U.S. 102)…
“ No subtlety of reasoning, no refinement of construction, or ingenuity of supposition, can make commerce embrace police or pauperism, which would not, by parity of reasoning, include the whole code of state legislation. Quarantine, health and inspection laws come much nearer to regulations of commerce, than those which relate to paupers only; if the latter are prohibited by the constitution, the former are certainly so, for they operate directly on the subjects of commerce-the ship, the cargo, crew and passengers; whereas, poor laws operate only on passengers who come within their purview. ”
