Sen. Kerry (Mass.) used the undeleted expletive to express his frustration and anger over how the Iraq issue has hurt him because he voted for the war resolution while Democratic front-runner Howard Dean has soared by opposing it.

"I voted for what I thought was best for the country. Did I expect Howard Dean to go off to the left and say, 'I'm against everything'? Sure. Did I expect George Bush to f - - - it up as badly as he did? I don't think anybody did," Kerry told the youth-oriented magazine.

Brookings Institution presidential scholar Stephen Hess said he can't recall another candidate attacking a president with X-rated language in a public interview.

"It's so unnecessary," Hess said. "In a way it's a kind of pandering [by Kerry] to a group he sees as hip . . . I think John Kerry is going to regret saying this."