From Josh Marshall

[T]he Ben Barnes interview is running Wednesday evening. But, I'm told by several sources that the Barnes' interview is only a relatively small part of the package 60 Minutes is running. There's other stuff that CBS has -- newly discovered, or at least newly-revealed, documents that shed light on Bush's guard service or lack thereof.

And this:

The text of a letter former President Carter sent to Zell Miller over the weekend ...

You seem to have forgotten that loyal Democrats elected you as mayor and as state senator. Loyal Democrats, including members of my family and me, elected you as lieutenant governor and as governor. It was a loyal Democrat, Lester Maddox, who assigned you to high positions in the state government when you were out of office. It was a loyal Democrat, Roy Barnes, who appointed you as U.S. Senator when you were out of office. By your historically unprecedented disloyalty, you have betrayed our trust.

Great Georgia Democrats who served in the past, including Walter George, Richard Russell, Herman Talmadge, and Sam Nunn disagreed strongly with the policies of Franklin Roosevelt, Harry Truman, John Kennedy, Lyndon Johnson, and me, but they remained loyal to the party in which they gained their public office. Other Democrats, because of philosophical differences or the race issue, like Bo Callaway and Strom Thurmond, at least had the decency to become Republicans.

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.

...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. These are not the characteristics of great Democrats whose legacy you and I have inherited

I contacted President Carter's office for comment and his press spokesperson Deanna Congileo told me that the letter was a private communication and that President Carter would not be issuing further comment.

The rest of the letter is here. I don't know how Josh got hold of it if it is indeed a private communication. "Leaked", I guess.