Zell and others show up at Sen. Chambliss rally in Cobb on Thuursday.

From the AJC's Political Insider:

Until this evening, Zell Miller had stayed out of the U.S. Senate race — and the presidential race, too, for that matter.

A number of heavyweights have climbed to the stage — foremost among them former U.S. senator and governor Zell Miller. Public Service Commission candidate Lauren “Bubba” McDonald, also in a runoff, is on the stage.

Gov. Sonny Perdue is not here — he’s at the Republican Governors Association in Miami. U.S. Rep. Tom Price has joined Westmoreland here. U.S. Sen. Lindsay Graham, over from South Carolina, is here as well. Big ally of McCain in D.C.

House Speaker Glenn Richardson and U.S. Sen. Johnny Isakson named as being here as well.
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And from The Wall Street Journal:

Arkansas Gov. Mike Huckabee is scheduled to campaign for Sen. Chambliss on Sunday. A Chambliss spokeswoman said the campaign hopes to get several other big-name Republicans to visit the state, such as Alaska Gov. Sarah Palin, former New York Mayor Rudy Giuliani and former Massachusetts Gov. Mitt Romney.