Defense of Marriage Act is unconstitutional, federal appeals court rules

[Ideologue]

Actually, there is a lot of law in various states which another state's courts will not apply if it offends their public policy.  Iirc, this can affect all sorts of things, from the application of another state's tort law to the validity of a will, or a marriage.  But don't quote me, because I haven't looked it up, not will I, because you are not a bar exam.