John F. Kennedy broke some sort of record for stating the obvious when he noted that "life isn't fair." More evidence for the unfairness of the nation's evaluations of presidents emerged in a recent Washington Post poll showing that, five years after he returned to Texas, George W. Bush is still blamed by 50 percent of Americans for the current state of the economy. Only 38 percent hold President Barack Obama responsible. The lesson for future presidents appears to be: You may be one of the greatest humanitarians in the history of the world (as Herbert Hoover arguably was, and as was Bush in some ways), but if you're in office when a financial crisis hits, the public will blame you forever.