In fact, fascism was an actual political party in Italy. Although fascism is constantly compared to nationalism, we can see nationalism in communism just as much (South Korea and Venezuela). There are quite a lot of nationalists that believe in the opposite of fascist and communist types of economy. Trump supporters, mostly, believe in a more open market type of economy than the opposition, for example.
They created checks and balances to make sure one branch didn't get more powerful than the other. This makes it very unlikely that congress would get more emphasis on power than the other branches.
