Listen to what he says. He is a classic libertarian. They want no government interference. This includes no restriction on victimless crimes like drugs and prostitution. Can you see any voting segment of American society buying into these philosophies.
On the business side, getting government out of private business except for enforcing contracts has some good points. Some goods would be cheaper, but pollution would not be controlled. Monopolies would dominate industry as happpened in the late 19th century. Look up robber barons.
There would be no social security or medicare so seniors and the poor would be required to live on charity. Probably no one would reach old age as they would die early due to pollution poisoning.
Just listen to what he says and think what would happen if his plans were put into practice.