Henry Baldwin, McCracken v. Hayward — Opinion of the Court
“ If any subsequent law affect to diminish the duty, or to impair the right, it necessarily bears on the obligation of the contract in favor of one party, to the injury of the other; hence any law, which in its operation amounts to a denial or obstruction of the rights accruing by a contract, though professing to act only on the remedy, is directly obnoxious to the prohibition of the Constitution. ”
