President Obama’s Twitter account, which is run by his "Organizing for Action" staff, follows 636,000 accounts. Many of them you might expect: Michelle Obama, Joe Biden, John Kerry. Even Mariah Carey and Snoop Dogg don't really raise an eyebrow. But several accounts on the presidential follow list fit a different theme: Asa Akira, a porn star who has 653,000 followers and, in her Twitter bio, states "I have an award-winning a****le." Joanna Angel (390,000 followers), who describes herself as a "multiple award winning punk porno princess;" Penthouse Pet Of The Year Nikki Benz (808,000 followers); and Ashley Steel (138,000 followers),...