Check out
http://cryptome.org/bush-bulge.htm for James M. Atkinson's detailed explanation, starting with this statement:
After examining numerous frames of video footage (C-SPAN 30 Sept 04) I have come to the professional opinion that either George Bush was wearing a wireless prompter/queuing system on the night of the debates, or our president is growing some kind of mutant dorsal fin. By very carefully examining the movement of his body and how it interacts with his suit jacket it is easy to rule out the possibility "the bulge" is simply a wrinkle in his clothing or a problem with bad lighting. Atkinson's website is
http://www.tscm.com/ , and his background and qualifications are given at
http://www.tscm.com/biojma.html .
I know he's already been mentioned in some news stories, but you really should see his detailed explanation and his credentials to understand how credible this charge is.
Interestingly, Atkinson believes Bush is wearing
both body armor and a wireless system.
He mentions, in his 10/9 message to cryptome.org, "There appears to be something actually IN his ear, and it is likely a monitor or cueing prompter." This is the first I've heard of anyone viewing the debate video actually seeing something inside Bush's ear. There is a photo at
http://hoffmania.blogspot.com/2004_10_03_hoffmania_archive.html , which as I understand it was taken at the National Prayer Breakfast last February, that appears to show a device in Bush's ear that's made of plastic in a shade of pink that doesn't match the skin tones elsewhere, and if you look very closely (or have seen the blowup someone else posted here) you can see there are several straight vertical lines in that plastic surface. I wonder if Atkinson has seen the photo, and if he could identify the type of earpiece by the distinctive pattern of lines?