We already have a birther in chief
The media double standard is at work again where Obama can joke about his birth certificate but Romney cannot. But Obama has been at it for much longer going back to his description by his booking agent in the 90s. That bit of dishonesty probably led to the birther phenomena. But the double standard will probably outlast Obama's tenure in office. It is the way the media rolls these days.
Introduced to a boy born in Hawaii, President Obama flashed the shaka sign and jokingly asked the child for his birth certificate.