In order to lead a country or a company you've got to get everybody on the same page and you've got to be able to have a vision of where you're going. America can't have a vision of health care for everybody green economy regulations - can't have a bunch of piece-meal activities. It's got to have a vision.
If you want to be successful it's just this simple. Know what you are doing. Love what you are doing. And believe in what you are doing.