“The accumulation of all powers, legislative, executive, and judiciary, in the same hands, whether of one, a few, or many, and whether hereditary, self-appointed, or elective, may justly be pronounced the very definition of tyranny.” – James Madison . From this quote, we can assume that James Madison supports:
Separation of powers
James Madison supported the separation of powers. Madison believed that keeping the three branches separated was fundamental to the preservation of liberty.