Think about powers reserved for the states, powers which the federal government in no way have. Can’t think of any? It is incredibly difficult to find many powers, much less any major ones, reserved for states exclusively.
This is all wrong. As a federalist country, separation of powers between the different levels of government is essential. Once upon a time it was true, but today the traditions of federalism are little more than theory. The federal government has expanded at an extraordinary rate, affecting nearly every part of our lives.