Op-Ed Columnist - Sorry, Senator Kerry - NYTimes.com Let us contemplate the badness of Joe Lieberman. Who would have thought that this holiday season we'd be obsessed with the senator from Connecticut? Really, I was hoping it would be more about shopping for mittens on the Internet. Lieberman's apparently successful attempt to hijack health care reform and hold it hostage until it had been amended into something that liberals couldn't stomach has mesmerized the nation's political class. This was, after all, a guy who has been a liberal on domestic issues since he was a college student campaigning for John F. Kennedy. A guy who was in favor of the public option, of expanding Medicare eligibility, until - last week. The theories about Why Joe Is Doing It abound. We cannot get enough of them! I have decided to start a rumor that it all goes back to the 2004 presidential race, when Lieberman not only failed to win any primaries, but was also bitten by either a rabid muskrat or a vampire disguised as a moose. Other than that, my favorite explanation comes from Jonathan Chait of The New Republic, who theorized that Lieberman was able to go from Guy Who Wants to Expand Medicare to Guy Who Would Rather Kill Health Care Than Expand Medicare because he "isn't actually all that smart." It's certainly easier to leap from one position to its total opposite if you never understood your original stance in the first place, and I am thinking Chait's theory could get some traction. "When I sat next to him in the State Senate, he always surprised me by how little he'd learned about the bill at the time of the vote," said Bill Curry, a former Connecticut comptroller and Democratic gubernatorial nominee. I really like the not-that-bright theory, in part because it's as good an explanation as any, and in part because it will definitely drive Lieberman nuts. But I have a different mission today, and that is to apologize to John Kerry. I frequently made fun of Kerry for being a terrible presidential candidate. Which he was. But there comes a point when we the people have to move on. And Kerry has been a really good former failed presidential candidate. He's been working hard in the Senate on climate control and trying to help the White House on foreign relations, despite the fact that Barack Obama stiffed him out of the secretary of state job in favor of a person who had been somewhat less supportive than Kerry of Obama's early presidential aspirations. He actually seems more interested in doing stuff than being admired. Lieberman was a terrible vice presidential candidate. Like John Edwards, he not only lost his vice presidential debate, he managed to make Dick Cheney seem likable. But instead of going back to something he could actually do well, he ran for president. He failed to gain any traction with the voters whatsoever, and like John McCain, he came out of the process bitterly denying that he was bitter. Let's look at our two failed-national-candidate models. You can move on, and try to make yourself useful (Kerry, Al Gore). Or you can work out barely suppressed rage by attacking things that you used to be for, like trying to control Medicare costs (McCain) or expanding Medicare eligibility (Lieberman). Maybe the difference comes from self-image. Lieberman and McCain both thought of themselves as "character" candidates whose success was due to the love and trust of the public, and whose ultimate failure was the work of evil forces beyond their control. Kerry and Gore never believed their success was due to their innate likability. When they lost the presidency, a part of them probably shrugged and remembered that they weren't all that popular in prep school, either. Politicians switch direction all the time, but the Lieberman experience has been weird because he doesn't seem to feel as though he's changed. He bounds around happily, doing the talk shows, confident that he's the same independent-minded independent who believes in independence as always. Observers who have known him for a long time feel as though they're living out a scene in a science-fiction movie when the guy who's just been bitten by the vampire-moose comes home and sits down to dinner, unaware that he's sprouting antlers. I used to cover Lieberman when he was the majority leader of the State Senate in Connecticut. We got along very well, except for one interview, during which he talked about working for J.F.K., and how he kept a Mass card from Robert Kennedy's funeral to remind him of the principles to which he had dedicated his career. Showing me the card, he remarked casually that he hadn't looked at it for some time. I wrote an article using the neglected Kennedy card as a metaphor for Lieberman's fall from his old ideals into the pragmatic politics of a party leader. He was outraged and wounded, and I believe I apologized. Taking back the apology now.