What governmental principle of the united states is based on montesquieu's concerns

Many credit Montesquieu with the development of the doctrine of separation of powers.

Montesquieu was concerned with the conflation of powers, wherein the legislature could also try and the judges could make law.

president franklin roosevelt supported the tva as part of his first new deal measures approved by congress in 1933. this new agency was designed to control floods, produce electric power, and improve the lives of people living in the tennessee valley. the tva accomplished many of these goals despite problems.