Rush Limbaugh On the Offensive Against Ad With Michael J. Fox

Michael J. Fox. (Scott Olson - Getty Images)

"Now people are telling me they have seen Michael J. Fox in interviews and he does appear the same way in the interviews as he does in this commercial," Limbaugh said, according to a transcript on his Web site. "All right then, I stand corrected. . . . So I will bigly, hugely admit that I was wrong, and I will apologize to Michael J. Fox, if I am wrong in characterizing his behavior on this commercial as an act."

Then Limbaugh pivoted to a different critique: "Michael J. Fox is allowing his illness to be exploited and in the process is shilling for a Democratic politician."

Limbaugh's shock at Fox's appearance is a measure of the disease's devastation, advocates say. Contrary to the charge that Fox might not take his medicine to enhance his symptoms, the medicine produces some of the uncontrolled body movements.

"Stem cell research offers hope to millions of Americans with diseases like diabetes, Alzheimer's and Parkinson's," Fox says in the Cardin ad. "But George Bush and Michael Steele would put limits on the most promising stem cell research."

Fox has appeared in ABC's "Boston Legal" this season. In his scenes, taped over the summer, Fox does not shake or loll his head as he does in the Cardin commercial, but does appear to be restraining himself, appearing almost rigid at times.

A source with direct knowledge of Fox's illness who viewed the Cardin ad said Fox is not acting to exaggerate the effects of the disease. The source said Fox's scenes in "Boston Legal" had to be taped around his illness, as he worked to control the tremors associated with Parkinson's for limited periods of time.

Staff writer Frank Ahrens contributed to this report.