William Howard Taft,
Tidal Oil Company v. Flanagan…
“ We cannot assume that Congress attempted to give to this court appellate jurisdiction beyond the judicial power accorded to the United States by the Constitution. The mere reversal by a state court of its previous decision, as in this case before us, whatever its effect upon contracts, does not, as we have seen, violate any clause of the federal Constitution. Plaintiff's claim, therefore, does not raise a substantial federal question. This has been decided in so many cases that it becomes our duty to dismiss the writ of error for want of jurisdiction. ”
