Earlier quoted context omitted.
Madison thought it highly unlikely that people who held immense power would not choose to use it. The Framers' model (and fear) was Rome, and much of our Constitutional design is intended to prevent an American Caesar. (One of the reasons Washington was universally revered was because he acted so contrary to what everyone thought was human nature.) "Ambition must be made to counteract ambition" he tells us in Federal…
Ironic, given that these same tendencies were very present around the fall of the Roman republic. Rome had a similar gridlock of opposing positions of power, and similarly fell into a state where little could be accomplished due to the regular undermining and vetoing. Edit: Since most replies are talking about the empire, I just want to reiterate that my comment was regarding the end of the Republic, which imo is a m…
In relation to the parent point, Octavian also went through great lengths to _appear_ to be acting at the will of the Senate. He was "first citizen" and all rights and protections granted to him here "granted" by the Senate. Whether this was under duress or just abdication for the sake of peace is debated.
There are some parallels between the current situation and the fall of the Republic, but there are for more differences. We are more at the Gracchi stage than the Caesar stage at this point. So there is hope!