inference seems to be conclusive, that the State courts would have a concurrent jurisdiction in all cases arising under the laws of the Union, where it was not expressly prohibited.
Here another question occurs: What relation would subsist between the national and State courts in these instances of concurrent jurisdiction? I answer, that an appeal would certainly lie from the latter, to the Supreme Court of the United States. The Constitution in direct terms gives an appellate jurisdiction to the Supreme Court in all the enumerated cases of federal cognizance in which it is not to have an original one, without a single expression to confine its operation to the inferior federal courts. The objects of appeal, not the tribunals from which it is to be made, are alone contemplated. From this circumstance, and from the reason of the thing, it ought to be construed to extend to the State tribunals. Either this must be the case, or the local courts must be excluded from a concurrent jurisdiction in matters of national concern, else the judiciary authority of the Union may be eluded at the pleasure of every plaintiff or prosecutor. Neither of these consequences ought, without evident necessity, to be involved; the latter would be entirely inadmissible, as it would defeat some of the most important and avowed purposes of the proposed government, and would essentially embarrass its measures. Nor do I perceive any foundation for such a supposition. Agreeably to the remark already made, the national and State systems are to be regarded as ONE WHOLE. The courts of the latter will of course be natural auxiliaries to the execution of the laws of the Union, and an appeal from them will as naturally lie to that tribunal which is destined to unite and assimilate the principles of national justice and the rules of national decisions. The evident aim of the plan of the convention is, that all the causes of the specified classes shall, for weighty public reasons, receive their original or final determination in the courts of the Union. To confine, therefore, the general expressions giving appellate jurisdiction to the Supreme Court, to appeals from the subordinate federal courts, instead of allowing their extension to the State courts, would be to abridge the latitude of the terms, in subversion of the intent, contrary to every sound rule of interpretation.