US presidents are used to deference and barking orders -- not wiping egg from their faces.
So it was unpalatable for Barack Obama to go on television Monday and admit glaring failures in the rollout of the health care law that bears his name.
Website snafus that have slowed sign ups to Obamacare in the three weeks since its launch are embarrassing on multiple fronts for the White House and represent a ballooning political challenge.
The Obama machine has always prided itself on efficiency and a "no drama" approach, and made great play of the governing debacles -- including Hurricane Katrina -- of the George W Bush administration.
The idea that government can work is also at the center of Obama's political creed -- and is a driving motivator of his ideological clash with Republicans. So any evidence to the contrary is inconvenient to say the least.
But the faulty debut of the healthcare.gov website is spurring questions over Obama's competence in implementing a law he wagered his presidency to pass three years ago, but which has yet to deliver a political payoff.
The embarrassment is even more acute since Obama built his career on exploiting the power of the Internet to build a political movement and woo Americans over the heads of the news media.
The Obamacare storm was building for days, but was obscured by the furor over a just avoided debt default and a government shutdown. The White House however sensed the row was about to break through, and over the weekend made clear Obama would address the website glitches head on.
"There's no sugarcoating it," the president said, bemoaning the website's faults.
"I think it's fair to say that nobody is more frustrated by that than I am."
But his appearance on a crisp fall day in the White House Rose Garden was less a mea culpa than a sales job.
"The product is good," Obama insisted, apparently worried that bad reviews of the website would sour Americans even further on Obamacare -- which polls show has a poor image.
The botched rollout, which Obama described as being plagued by "kinks", offered an opening to Republicans stung by coming off second best in the shutdown drama.
House Speaker John Boehner, who has long blasted Obamacare as a "train wreck" wove a wider parable of supposed failures encompassing the whole of Obamacare, which targets 40 million Americans without health insurance.
"What the president offered today was little more than self-congratulation," Boehner said.
"Either the president doesn't grasp the scale of the law's failures or he doesn't believe Americans deserve straight answers."
Obama however argued the law is "more than a website" and noted popular provisions including the prohibition on insurance firms denying coverage to someone with a pre-existing health condition.
The Department of Health and Human Services has ordered a "surge" of technology experts to repair the website and says Americans can also register by phone.
But it still will not say how many people have secured insurance through the new law.
How badly Obama and his signature domestic achievement are damaged may depend on how quickly the fixes work.
If problems linger, Obama will face mounting calls to delay the mandate for all Americans to buy health insurance or pay a fine equivalent to one percent of their income. This is due to come into force next year.
There is also a growing drumbeat for the head of HHS Secretary Kathleen Sebelius -- though White House aides privately say her job is safe, blaming contractors, not administration officials, for the problems.
Top aides to Obama have long believed that once more Americans see the results of Obamacare in action, the law would become more popular. But such hopes may not survive days of stories over its botched debut.
"Every day that there are problems with the Obamacare website is going to be a day where the Republicans say this is Obamacare writ large," said Dante Scala, a political science professor at the University of New Hampshire.
"If it is something that lingers for months that is a big problem. It will feed into a public perception that it won't work."
To work, Obamacare must attract droves of healthy, young people -- who typically are the most loath to buy health insurance -- to sign up to subsidise the risk posed by older, sicker, consumers. So anything that deters them from taking the plunge could be disastrous for the law.
With that in mind, and given the centrality of Obamacare to the president's political identity, many experts are baffled at the mess.
"That they didn't seem to have this better prepared for the rollout on October 1 goes beyond me being surprised," said Daniel Sledge, a professor and health care specialist at the University of Texas.