A Kinda Crazy Idea

What if the term of office for an elected official, like President, was determined by their margin of victory.  What if some of their powers weren't also so determined?

For example, if you win the Presidency by under 50%, we have an election again in a year, and, for example, you couldn't veto legislation passed by more than 60% of Congress?  If you win under 55%, the election is in two years. 

What's the advantage of giving squeakers the same exact benefits of those who are popular with the large super-majorities of the public?