CNN

Democrats attacked Sen. Lieberman after he said Tuesday night that Sen. Obama had never reached across party lines.

(CNN) - Democrats accused former colleague Sen. Joe Lieberman of misleading the Republican National Convention when he addressed them in a speech Tuesday night.

A senior Barack Obama campaign adviser said Lieberman flat-out lied when he told delegates that Obama never successfully reached across party lines.

"Joe Lieberman ought to be ashamed of himself for some of the things he said tonight, not as a Democrat but as an American," adviser Robert Gibbs said on "Larry King Live."

Lieberman, an independent senator from Connecticut who was the Democratic vice presidential candidate alongside Al Gore in 2000, has thrown his support behind John McCain, a longtime friend.

Lieberman urged Democratic and independent voters to make a change and vote for a McCain because, he said, he would do whatever it took to help the American public.

Lieberman attacked Obama's rhetoric, saying "eloquence is no substitute for a record."

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