Liberal democracy proved to be a failure due to many economic problems that the world faced and the way that wars were being handled. People understood that government should have higher power in order to make sure that things like the great depression doesn't happen, while also understanding that a mass militarization is necessary in order to be capable of fighting a war as great as the first world war.
That there will be madness and a loss of rule of law, because he sees it as a total aversion of law.
The executive branch of our government is in charge of making sure that the laws are obeyed. the President is actually the head of this branch.