More generally, I feel that one of the main reasons the Supreme Court is such a powerful body nowadays, and why cases like this are considered so important, is because Congress has become so ineffectual. We have internalized the idea that the Supreme Court has the last word on every matter before it. But it emphatically does not. The Supreme Court is only the last word on constitutional cases. So many decisions - this one, certain decisions on gerrymandering - are completely overturnable by Congress.