Presidents generally have to significantly affect the structure and operation of the federal bureaucracy.

Presidents generally have "no power or powerless" to significantly affect the structure and operation of the federal bureaucracy.

The power of being president is something beyond a single individual, it is a complicated office. It is the main office at any level of government in this nation that is chosen nationally. If one were to take a gander at the Constitutional criteria determining this office, it would give off an impression of being significantly less ground-breaking than the vast majority accept.