In our opinion this is not a suit arising under the Constitution or laws of the United States, within the meaning of that term as used in the removal act. If the courts of Missouri gave a wrong construction to the laws of Illinois in the judgment set up as an estoppel, that error cannot be corrected by means of a transfer of this suit from the State court to the Circuit Court of the United States. So long as the judgment stands, it cannot be impeached collaterally in the courts of the United States any more than in those of the State, by showing that if due effect had been given to the laws it would have been the other way. If it has the effect of an estoppel, as is claimed, it will continue to have that effect until reversed or set aside in some appropriate form of proceeding instituted directly for that purpose. The courts of the United States must give it the same effect as a judgment that it has in the courts of the State. Whether as a judgment it operates as an estoppel does not depend on the Constitution or laws of the United States. The correct decision of this question of estoppel, therefore, does not depend on the construction of the Constitution or laws of the United States, but on the effect of a judgment under the laws of Missouri. The public acts of Illinois are in no way involved. If full faith and credit were not given to them by the Missouri court, in the judgment which has been rendered, that may entitle the railroad company to a review of the judgment here on a writ of error, but in no other way can this or any other court of the United States invalidate that judgment on account of such mistakes, if any were in fact made.
Another ground taken in support of the jurisdiction of the
It is not even alleged in the petition for removal, or claimed in argument, that the courts of Illinois have as yet actually given the statutes in question any such construction as it is contended they should have. The most that can be insisted upon from all the allegations is, that on account of what has been done in other cases, the railroad company expects, when an opportunity occurs, the courts of Illinois will decide that the laws of that State gave the company no power to bind itself in the way the Missouri court has determined it did. So that the position of the railroad company on this application seems to be, that, while the questions arising on the effect of the public acts are apparently open in the courts of Illinois, and nothing has been done which, even on the principles of comity, can bind the courts of Missouri, a suit pending in a Missouri court may be removed to a court of the United States, because the Missouri court, on a former occasion, construed a public law of Illinois, which is involved, differently from what it should have done. To allow a removal upon such grounds would be to say that a suit arises under the Constitution and laws of the United States whenever the public acts of one State are to be construed in an action pending in a court of another State. Clearly this is not so. Even if it be true, as is contended by the counsel for the plaintiff in error, that a suit can be removed as soon as a federal question becomes involved, it is sufficient to say that in this case such a question has not arisen. Until the Missouri court fails, in this suit, to give full faith and credit to the public acts of Illinois, no case has arisen to which the jurisdiction
The order remanding the cause is affirmed.