The Obama White House runs a petition website called "We the People," which encourages Americans to sign up with a White House account in order to create and sign petitions. If a petition meets a certain threshold of signatories within 30 days - right now it's 25,000, though that number has changed often - then President Obama will issue an official response.
On December 21, "Kurt N." from Austin, Texas created a petition to "Deport British Citizen Piers Morgan for Attacking 2nd Amendment." In the wake of the horrific Newtown, Conn. school shooting, CNN talk show host Piers Morgan has gone on the offensive both on his show and on his official twitter account against law-abiding Americans' right to bear firearms.
The petition passed 25,000 signatures yesterday, which will necessitate an official Obama response.
President Obama's petition website has always been a little bit silly: a petition that supported the funding and construction of a "Death Star" met the requisite number of signatures last month, and the White House has refused to respond.