Former aides to Sen. Hillary Clinton say those who switched their support to Sen. Barack Obama may be on the outs.

WASHINGTON (CNN) — One after another, they jumped ship and left Sen. Hillary Clinton's campaign to back her Democratic rival, Sen. Barack Obama. And while the chapter on her campaign may be closed, there are still open wounds over those who've crossed the Clintons.

"So today, I am standing with Sen. Obama to say, 'yes we can!' " Clinton said on Saturday.

Yes, Clinton can support Obama in his race for the presidency. But as for the former Clinton supporters who switched sides, forgiving and forgetting might not come that easily.

The New York Times reported that some Clinton loyalists have been keeping tabs on those who have crossed the Clintons.

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But CNN contributor and longtime Clinton backer James Carville told CNN's Wolf Blitzer Wednesday that article is "laughable."

"It's a very silly piece … There really wasn't a list … It's laughable. I talked to a lot of people in Clinton land today and they're not even sure what the point of the story was," he said.

One former Clinton adviser, however, said there's no doubt some have forever burned bridges with the power couple.

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Mrs. McCain released her 2006 tax returns Friday.

WASHINGTON (CNN) – Cindy McCain released part of her 2006 tax returns Friday. The filings show she earned a total income of $6 million, and paid more than $1.7 million in taxes. She also claimed deductions of close to $570,000.

Her husband John McCain's presidential campaign said she had received an extension on her 2007 tax returns, and planned to release those as well. Her husband, presumptive Republican nominee John McCain, made his own returns public last month.

Under a prenuptial agreement, the couple keeps their tax returns and assets completely separate. Cindy McCain is heiress to a liquor fortune.

A campaign spokesman said she still had concerns about the privacy of her children — the reason she had given earlier for not releasing the records — she did not want the lingering questions continue to be a distraction from other issues.

The campaign dismissed questions over its decision to release the documents late on the Friday of Memorial Day weekend. "The campaign makes determinations when the make things public," spokesman Tucker Bounds told CNN. "This is something that came together today. We feel very good about that fact that people are able to get the information that they had asked for."

A campaign aide says that Cindy McCain made the decision recently, but this was the first time the campaign had had a chance to release the documents.

He added that the moves will exceed those of Teresa Heinz Kerry, also an heiress, when her husband John Kerry was the Democratic presidential nominee in 2004. Heinz Kerry made one year of returns public, but withheld some portions of the filing, and did not release the information until the final months of the campaign.

Greenspan said he is supporting McCain.

(CNN) — Former Fed Chairman Alan Greenspan is supporting John McCain's White House bid, CNN has confirmed.

"I am a Republican and expect to vote for the Republican candidate, but I am not involved in politics," Greenspan said in a statement issued to CNN by his office.

The statement follows comments Greenspan reportedly made to a Spanish newspaper on Sunday.

"I support John McCain, who I know very well and who I respect a lot," he told El Pais.

McCain has previously indicated he will seek Greenspan's council on economic issues should he win the presidency. At a campaign event in South Carolina last fall, the Arizona Republican even said he would take him "alive or dead."

"If he's alive or dead it doesn't matter. If he's dead, just prop him up and put some dark glasses on him like, like 'Weekend at Bernie's,"' McCain joked. "Let's get the best minds in America together and fix this tax code."

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