Why do candidates still talk about ’11 million illegals?’

From WND:

Tom Fitton, president of Judicial Watch, has said he believes an estimate of 12 to 15 million illegals is believable, but to him the more important number is how many immigrants, whether legal or illegal, are arriving in the U.S. annually. This number is not debatable nor does it change depending on the source. That number is 1.1 million per year.