Actor Michael J. Fox has been filming commercials for Democratic candidates who support stem cell research — although that’s an issue that scrambles the usual party and moral divisions. If you’ve seen one, with Fox twitching and his voice shaking as he argues for a given candidate, you just know that these ads are effective.

Enter Rush Limbaugh. Rush said earlier this week that Fox was faking it for effect. That’s rough stuff even by talk radio standards. Limbaugh subsequently apologized (while still criticizing Fox for ‘shilling for Democratic politicians’ in fine j’accuse! style), but it still makes you shake your head