"E. Pluribus Wiggum"

Jon Stewart, the host of Comedy Central's The Daily Show, will be making a guest appearance as himself on the January 6, 2008 episode of The Simpsons, along with Dan Rather.

"It's truly a great honor and I'm very excited about it," said Stewart.

Synopsis:

After Springfield becomes the first city in the nation to hold a presidential primary election, excitement builds as reporters from around the country, including Jon Stewart and Dan Rather, descend upon Springfield to cover the debates. When the candidates turn out to be less than compelling, Kent Brockman announces an unexpected turn of events: Springfield voters rejected all of the candidates and embraced a write-in: notorious bed-wetter Ralph Wiggum.

With Ralph as the new presidential front-runner, Republican and Democratic party leaders fight to win him over as their candidate. Find out if Ralph can make the leap from Sesame Street to Pennsylvania Avenue.

Comics Continuum has a video of Jon Stewart recording his dialogue for the episode here.