by John Marshall Harlan, Pullman Company v. Kansas ex rel…
“ I am quite unable to believe that an otherwise lawful exclusion from doing business within a state becomes an unlawful or unconstitutional burden on commerce among states because, if it were let in, it would help to pay the bills. Such an exclusion is not a burden on the foreign commerce at all; it simply is the denial of a collateral benefit. If foreign commerce does not pay its way be itself, I see no right to demand an entrance for domestic business to help it out. ”
