What if the looser of the presidental election automatically had to become the vice president ?

Well, you'd be making two enemies work together. I can't imagine much would get done. It's hard enough for the president to get anything through as it is. Not to mention that the Vice President becomes president if the current president dies. A little tempting to put someone who wants to be president in a position where they can become president if something mysteriously happens to the president, eh?