Michael J. Fox has come under fire for his appearance in election-season TV spots that deride certain GOP candidates for fighting stem-cell research that could potentially cure Parkinson's disease, from which the actor suffers. Conservative pundit Rush Limbaugh, for one, has accused Fox of either being "off his medication or acting" - playing up his writhing and voice-quaking - in the spots, while others have labeled Fox's claims as "mistruths." Limbaugh has since apologized, yet insists Fox has allowed Democrats to "exploit" his illness. This may very well be the first Fox news that Rush hasn't deemed fair and balanced.