The Massachusetts senator conceded to George W. Bush on Nov. 3, 2004, the day after the election when it became clear that the uncounted votes in the swing state of Ohio were insufficient to erase Bush’s narrow lead.
The move infuriated some Democratic activists who felt Kerry should have lived up to his campaign promise that he would make sure every vote was counted. In January 2005, as Bush’s victory was being certified by Congress, Kerry also refused to back a resolution challenging the fairness of the Ohio vote.
here's the quote from Mark Crispin Miller:Speaking of John Kerry, I have some news for you. On Friday, this last Friday night, I arranged to meet Senator Kerry at a fundraiser to give him a copy of my book. He told me he now thinks the election was stolen. He said he doesn't believe that he is the person who can go out front on the issue, because of the sour grapes, you know, question. But he said he believes it was stolen. He says he argues about this with his Democratic colleagues on the Hill. He had just had a big fight with Christopher Dodd about it, because he said, you know, ‘There's this stuff about the voting machines; they’re really questionable.’ And Dodd was angry. ‘I don’t want to hear about it,’ you know, ‘I looked into it. There’s nothing there.’