Dodd is facing long odds in his 2010 reelection effort.
One hundred and seventy-five people paid $500 each to hear Biden call Dodd "the single most gifted legislator in Congress, now that Teddy Kennedy's gone."
Biden acknowledged that Dodd is in a very tough race for re-election, saying: "Chris is getting the living hell beat out of him, the living bejesus beat out of him."
"Why? Because he's being a leader," said the vice president.
"This is going to be a hell of a race and it's an uphill race," Biden said, "but Chris Dodd will prevail."