Oliver Wendell Holmes, Jr., Western Union Telegraph Company v…
“ The suit was brought upon this statute and a judgment rendered for the State in its courts was held to have given effect to the statutory attempts to enlarge the obligations of the Railway Company under a grant from the State. The difference between that case and this is plain. A mere authority to test disputed rights by a suit does not impair the obligation of a contract upon which a defendant relies. When a claim is set up under a contract the Constitution does not forbid litigation to decide whether one was made or what it means. ”
