An NRA spokesman tells me that ex-NYC Mayor Rudy Giuliani, a prominent advocate for gun control when he was mayor of New York City, will be among those presidential candidates who speak to before the NRA's Celebration of American Values convention in Washington Friday.

The NRA members know Giuliani's record well, and many Republicans believe that Giuliani's past support for tough gun laws will prove deadly.

But Giuliani is signing a different tune these days.

Also attending:

Sen. Fred Thompson, Sen. John McCain and Gov. Mike Huckabee.

Democrat Bill Richardson will speak to the NRA via videotape, along with Rep. Duncan Hunter and Gov. Mitt Romney.

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