You know........in wartime and the military, the captain is the most important person on the ship. Responsible for everything onboard, material as well as people.
The job of President is also kinda like that. And, just like in war, if the skipper fails, it demoralizes the crew, and places them in a very easy place to get killed. If the skipper dies, same thing.
Now. With that being said, you DO realize that if the President fails, the country fails, because he is the one leading it!
Anyone remember the last administration? Jr. succeeded in the first term (kinda), but, failed miserably in the second.