A good term. It is a ridiculous idea for the Federal Government to make laws on things such as enacting same-sex marriage, when the idea is repugnant to majorities in many states, just as it would be vice-versa.
Social, cultural and some economic issues should be left in state hands. Defence, overall economic management and justice should remain in Federal hands.
So if a state, say Alabama or Texas, wanted to enact a law reinstating racial segregation, that'd be a good idea, because it's "ridiculous for the Federal Government to make laws on [such] things"? It is a sociocultural issue...