Why not Treat Ineffective Presidents like CEOs: Fire them

Great idea from C.S.M.:

But what about the vulnerabilities arising out of our fixed, four-year presidential terms? Poor judgment and incompetence by a chief executive can bring a major corporation to its knees in short order. That's why boards reserve the right to fire CEOs at a moment's notice. So why do America's CEOs enjoy a free ride for four years, when so much more is at stake?

[...] when California Gov. Gray Davis was recalled by voters and replaced by Arnold Schwarzenegger, the sky didn't fall. Perhaps the sky wouldn't fall if presidents woke up every morning and not just once every four years knowing they were subject to removal for poor performance