From the 11/13/05 Baltimore Sun report "Ehrlich bristles at Oreo skeptics":

Gov. Robert L. Ehrlich Jr. said yesterday that he is angry at "revisionism" from political opponents who question a much-repeated story about Lt. Gov. Michael S. Steele being pelted with Oreos during a 2002 campaign debate in Baltimore.

Now, see the 2/16/05 Baltimore Sun column reprinted here.

"You know who the members of the Oreo Cookie Gang are: Maryland's Democrats, the same ones who either:

a.) Brandished Oreo cookies at a gubernatorial debate at Morgan State University between then-candidates Robert L. Ehrlich Jr. and Kathleen Kennedy Townsend in 2002 or:

b.) Haven't uttered so much as a syllable condemning the despicable act.

Well, when it comes to apologies, let's take care of first things first, shall we?

If Democrats are really serious about apologies, then each and every single one of them should line up to apologize to Lt. Gov. Michael Steele for that Oreo cookie business."

I guess the "liberal" reaction to this is to claim that they only brandished Oreos, and did not actually violently throw them. Or something.

See also this 11/04/02 article:

At a September debate in Maryland between the candidates for lieutenant governor, supporters of Democratic gubernatorial candidate Kathleen Kennedy Townsend passed out Oreo cookies to mock black Republican hopeful Michael Steele. At another debate that month, between Townsend and Republican Bob Ehrlich, Democrats also passed out Oreos--and then led the crowd in raucous booing of Ehrlich's wife and elderly parents. Afterwards, Democrats keyed the cars of several Ehrlich supporters.

And, from 4/05, with no incident date

Activists brandished Oreo cookies in an orchestrated stunt at a campaign debate.

That also mentions the feud between the Sun and Ehrlich/Steele.