Sen. Joe Lieberman told NBC's Tom Brokaw that he regretted some of his statements attacking Barack Obama during the campaign but declined to offer an apology.

"I do regret as I said to the caucus and afterward publicly, there were some things I said in the heat of the campaign that I wish I had said more clearly. Other things, frankly, I wish I hadn't said at all," said Lieberman. "That happens to all of us in the heat of it campaign but nonetheless, I regret it and I want to move forward."

Brokaw pressed Lieberman for an apology. "I heard word 'regret' but not the word 'apology.'"

"You can take from the word regret what you will," answered Lieberman.

John Amato:

Brokaw made a point of telling Joe that he used to hold others accountable back in the day, when he stabbed Clinton in the back during the impeachment. "Holding yourself accountable, looking back at the last six weeks, two months or so, what are the statements you most regret? Joe wouldn't go into the details, because they were so many times that he crossed the line, but he still thinks McCain is a really swell guy. He called Obama and Barack was too busy to answer.

Watch your back.

Although I think he'll be on his best behavior initially because the economy is in such shambles, there will be a time when he speaks out against Obama.