The area was part of the Louisiana purchase
Answer:
It is because of the USSR and them taking over lots of country's and for example the Vietnam war and the Korean war. In both wars the communist's parties were supplied by the USSR. Another thing is that both country's kept on feeling threatened by each other.
In order to establish a system of balances to create equal division of power. They didn't want the president to have to much power because the branches might do crazy things.