Scandal on the front page of the Washington Post from 1977-208.
To get a good political scandal going, you need a slow news cycle and a bunch of folks who kinda hate you. That's the very rough version of the political science in Brendan Nyhan's new paper(pdf), "Scandal Potential."
But even that formula requires scandalous behavior. Steve Benen floats the idea that President Obama has made it this far into this first term without a Plame Affair or an Interngate because he's living right:
Some of this may have to do with lessons learned — these officials saw what the nation had just endured during the Bush/Cheney era, and committed themselves to avoiding even the appearance of wrongdoing. We've also seen this administration act quickly to nip potential problems in the bud, before they go anywhere. (In some instances, such as Shirley Sherrod, they've acted too quickly.)
But I tend to think the best answer is probably the most obvious: Obama and his team just aren't corrupt.
Below, amazing formulas from Brendan Nyhan's report.
Political science sometimes goes like this.