Questions about Yunis

1) To what extent are the bases for exercising federal legislative jurisdiction described in Yunis like or unlike interest analysis?

2) To what extent are they like or unlike the constitutional limits on state legislative jurisdiction under the full faith and credit and due process clauses?

3) Is Congress truly limited in its application of the federal law extra-territorially by the principles of international law described in Yunis? If not, does the due process clause of the Fifth Amendment put some limits on Congress?

4) How does one examine the limits on U.S. states' attempts to apply their laws outside the United States?