I do believe Zell Miller is going to challenge Jimmy Carter to a duel

Josh Marshall has Carter's letter to Miller. Excerpts:

You seem to have forgotten that loyal Democrats elected you as mayor and as state senator.
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By your historically unprecedented disloyalty, you have betrayed our trust.
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Everyone knows that you were chosen to speak at the Republican Convention because of your being a “Democrat,” and it’s quite possible that your rabid and mean-spirited speech damaged our party and paid the Republicans some transient dividends.

Perhaps more troublesome of all is seeing you adopt an established and very effective Republican campaign technique of destroying the character of opponents by wild and false allegations.
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Zell, I have known you for forty-two years and have, in the past, respected you as a trustworthy political leader and a personal friend. But now, there are many of us loyal Democrats who feel uncomfortable in seeing that you have chosen the rich over the poor, unilateral preemptive war over a strong nation united with others for peace, lies and obfuscation over the truth, and the political technique of personal character assassination as a way to win elections or to garner a few moments of applause.