We've Met The Enemy And He Is Us, or At Least Your Neighbor.

Continuing the meme that every American is a potential terrorist, the latest public official to weigh in is U.S. Attorney General Eric Holder.

In an interview with ABC's "Good Morning America," U.S. Attorney General Eric Holder spoke of the ongoing fight to protect American national security and expressed his growing concern with the threat of homegrown terror - a danger which he said "keeps me up at night."

"What I am trying to do in this interview is to make people aware of the fact that the threat is real, the threat is different, the threat is constant," Holder told ABC's Pierre Thomas, in an interview that aired Tuesday morning.

"The threat has changed from simply worrying about foreigners coming here, to worrying about people in the United States, American citizens -- raised here, born here, and who for whatever reason, have decided that they are going to become radicalized and take up arms against the nation in which they were born," Holder added.