At another time, Abby mentions that the government is only allowed to do things specified in the Constitution. This is clarified by the Tenth Amendment: "The powers not delegated to the United States by the Constitution, nor prohibited by it to the States, are reserved to the States respectively, or to the people."
As much as I wish I could say it is not true, unconstitutional behavior by the government is a thing not relegated to fiction. In fact, the government today seems to do more that is unconstitutional than is constitutional. Gun control, the NSA, and the "separation of church and state" are some prominent examples.
Below is a fun and educational video written and acted by some good friends of mine all about what the Constitution is and why it matters. The government needs to follow the Constitution, and it's your job to make them do it.