We are reminded here why we voted for Republicans in 2008 and again in 2012. They suck less.
Exhibit A: the ad Romney asked the RNC not to run because it would distract from the economy.
While the partisan in us wants to suggest a Constitutional Amendment saying no incumbent can run for re-election if he has less ambassadors than he started with, we know that policy could be exploited by future enemies in order to keep a good president from running.
In fact, like many common sense things, this shouldn't have to be written into law. You can thank the public education system and the welfare state for our current predicament.