<span>Fully and clearly expressed; leaving nothing implied</span>
Answer:
The answer you're seeking is both Senate and President.
Federalism, or the dual roles of state and national government, is part of the system of sharing power in government. Within the system of separate powers, however, the framers of the Constitution provided for "national" or "federal" supremacy. This meant that the national government was supreme in regards to many issues in relation to state governments, as enumerated by the Constitution.
The statement that is not characteristic of Incan government is Incan government was nonexistent. The government was centralized and featured an elaborate system of administrators.