Summary

National Mutual Insurance Company of District of Columbia v…

It is elementary that the exclusive responsibility of Congress for the welfare of the District includes both power and duty to provide its inhabitants and citizens with courts adequate to adjudge not only controversies among themselves but also their claims against, as well as suits brought by, citizens of the various states. It long has been held that Congress may clothe District of Columbia courts not only with the jurisdiction and powers of federal courts in the several states but with such authority as a state may confer on her courts.
Source: Wikisource

National Mutual Insurance Company of District of Columbia v…

III contains merely a grant of power to Congress, there is no more reason to find any limitation in the fact that the judicial power extends only to cases and controversies than in the specific enumeration of the kinds of cases or controversies to which it shall extend. The fundamental error in this position, as I see it, is the failure to distinguish between two entirely different principles embodied in Art. III, as elsewhere in the Constitution, both of which were repeatedly adverted to in the Constitutional Convention and have since been followed by this Court without substantial deviation.
Source: Wikisource

National Mutual Insurance Company of District of Columbia v…

We can no more review a legislative court's decision of a case which is not among those enumerated in Art. III than we can hear a case from a state court involving purely state law questions. But a question under the Constitution and laws of the United States, whether arising in a constitutional court, a state court, or a legislative court may, under the Constitution, be a subject of this Court's appellate jurisdiction.
Source: Wikisource

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