The 'enemy within' are those who put him there and are keeping him there.

You know, the wealthy, upstanding people who own half the town they live in and always gets their way?

The same people whom we have been programmed to worship because they are greedier than other people.

The same people who have been corrupting our governmental structure for decades because they can.

Those are the enemy within. That orange gibbon can not walk and chew gum at the same time.

You can tell instantly that he's a really dangerous person. It's no wonder people back down. He would do anything just to entertain himself.