That's been circulating for a couple of years by e-mail. I seriously doubt it's for real.
I never believed it for a second. I was watching Leno some time ago, and I remarked to my wife that he usually spends the first five minutes of his monologue slamming Republicans while sparing Obama any harsh criticism. That night, as usual Leno opened up his monologue with a tirade directed at all the Pubbie candidates. Then he made a weak jab at Obama. With that my wife triumphantly announced that proved that Leno wasn’t biased. The next night Leno again during his monologue launched into a heavy attack of Pubbie candidates without even one mild Obama joke. Yeah, I smirked, Leno isn’t biased at all. My wife stared daggers at me.