Any US citizen can write a Petition against someone or a policy, and if 25,000 citizens Sign that petition, the White House will have to respond to it. - They call this "We the People" Program.
I didn't know this until today when i heard CNN's TV host Piers Morgan has a Petition demanding for his Deportation over comments he made blaming the US constitution (Gun control) for the Killing of those innocent kids at Sandy Hook Elementary School in Newtown, Connecticut.
The petition has gotten an amazing 82,000 Signatures so far, so the Government must respond to it.
Will Piers Morgan Be deported? < Source