(Jim Cole ~ Associated Press)
From Mitt Romney this month to John McCain in 2008 and John Kerry four years earlier, presidential candidates are caught telling the truth by accident in every campaign, blurting a phrase that is both factual but politically ill-advised.
Those moments speak to the deeply contradictory nature of American politics.
Voters say they want authentic, straight-talking candidates. But voters also tend to punish candidates who veer too far off script or who make assertions that, while true, cause people to cringe and question whether these politicians are out of touch with those they seek to represent.
Consider Romney, the early GOP front-runner who recently confronted a heckler in Iowa who was demanding higher taxes on corporations.
"Corporations are people, my friend," the former Massachusetts governor shot back. "Everything corporations earn ultimately goes to people."
Romney said it again at a campaign event in New Hampshire on Wednesday.
"When you say tax corporations, steel, vinyl, concrete, they don't pay taxes. Only people do," he said.
Corporations are made up of the people who work for them and stockholders who benefit from their profits. The Supreme Court said as much last year when it eased restrictions on campaign spending by corporations, saying businesses deserve the same freedom of speech individuals enjoy.
But it was smart for Romney to say, given the nation's high unemployment and deep resentment of Wall Street? Probably not.
Democrats, predictably, pounced. President Barack Obama said he disagreed with the notion that corporate tax breaks are "good for ordinary Americans."
It's possible that Romney's comment won't damage his campaign because Republican primary voters tend to view business interests more favorably than do Democrats. But because of his wealth and history at Bain Capital, a private equity firm that created jobs in some places but made them disappear elsewhere through consolidation, the remark could reinforce the perception that Romney is disconnected from the concerns of working people.
"The gaffes that get traction tend to be the ones that fit a narrative that already exists about the candidate," said Marc Hetherington, a political science professor at Vanderbilt University who studies campaign rhetoric. "Since corporations are very unpopular right now, it could really stick to someone like Romney who is so identified with the business community."
Massachusetts Sen. Kerry, the 2004 Democratic nominee, learned a hard lesson about reinforcing an existing story line. He opposed money the war in Iraq and voted against the legislation when it came up for final consideration. But he had gone along with an earlier version.
At one point, he told supporters: "I actually did vote for the $87 billion before I voted against it." He was trying to explain that he wanted to ensure troops had the necessary equipment, but at the same time hoped to convey a message of opposition to the war.
The result was the Republicans cast Kerry as a flip-flopper in contrast with President George W. Bush's image of strength and resolve. Bush narrowly won re-election that year.
In the fall of 2007, Hillary Rodham Clinton found herself in an uncomfortable spot just as Obama was gaining traction in the Democratic primary in part by railing against special interests.
Before a liberal audience and with Obama on stage nearby, Clinton launched a spirited defense of lobbyists -- inadvertently burnishing her reputation as a protector of the status quo in Washington.
"A lot of these lobbyists, whether you like it or not, represent real Americans," she said. "They represent nurses, they represent social workers, they represent corporations that employ a lot of people."
It was true, but ill-timed and problematic, particularly in front of a progressive audience that already doubted Clinton's commitment to liberal issues.
McCain, the Republican presidential nominee in 2008, faced a similar situation that September after the collapse of the Lehman Brothers investment bank and at the outset of the global finance meltdown.
"The fundamentals of the economy are strong," McCain said. He was trying to reassure a jittery nation that its workers, whom he called the backbone of the economy, were resilient and productive. Few probably would disagree with that explanation, but as the stock market tanked his sound bite sounded jarringly off base.
It was a searing misstatement for the Arizona senator who had never seemed comfortable discussing the economy.
Charlie Black, a top adviser to the McCain campaign at the time, attributes McCain's loss more to the financial crisis than that comment. Black also doubted Romney would suffer from his comment, given his campaign performance thus far.
"Romney has been out there quite a while in a low key way," Black said. "If that's the first mistake he's made so far, it's a pretty good batting average."
Another GOP contender in 2012, Texas Gov. Rick Perry, has had his own moments of inadvertent truth-telling. He's been asked to defend comments from his book, "Fed Up," in which he called Social Security a "Ponzi scheme."
The Social Security system does pay benefits to retirees from what it collects from current workers, much as a Ponzi scheme draws on payments from new investors to shell out returns to existing ones. There is a chance that if left unchanged, Social Security will not collect enough benefits to fund the swelling number of future retirees.
But a Ponzi scheme is a deliberate fraud.