CNN

One of the jobs of American presidents, whether they realize it or not, is to make us laugh.

You need look no farther than George W. Bush. But if you want to look farther, there's a gold mine of yucks. Whether it's Bill Clinton with his blue dresses and cigars, Al Gore with his robotic seriousness, Ronald Reagan sleeping through cabinet meetings, or Dan Quayle trying to spell potato. And of course, President Bush's dad meeting a grocery store scanner for the first time was priceless – as was President Carter's tale of being attacked in a rowboat by a rabbit.

But what about Barack Obama?

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