President Obama and Twitter: Why he took control of his own account

The White House announced that President Barack Obama would make it clear which tweets were by him and which were by staffers. It's a nod to the coming campaign, as well the fallout from the Rep. Anthony Weiner scandal. Politicians are under pressure to reassure followers about who is actually behind social media messages, and followers are getting more adept at sniffing out when a public figure is using social media consultants to post and tweet on his or her behalf, says Jonathan Askin, a media professor at Brooklyn Law School.