What else could it be?

It was a catchy political pitch and a chance to calm nerves about his dramatic and complicated plan to bring historic change to America's health insurance system.

"If you like your health care plan, you can keep it," President Barack Obama said -- many times -- of his landmark new law.

But the promise was impossible to keep.

So this fall, as cancellation letters were going out to approximately 4 million Americans, the public realized Obama's breezy assurances were wrong.

Boiling down the complicated health care law to a soundbite proved treacherous, even for its promoter-in-chief.  Obama and his team made matters worse, suggesting they had been misunderstood all along. The stunning political uproar led to this: a rare presidential apology.

For all of these reasons, PolitiFact has named "If you like your health care plan, you can keep it," the Lie of the Year for 2013. Readers in a separate online poll overwhelmingly agreed with the choice. (PolitiFact first announced its selection on CNN's The Lead with Jake Tapper.)

For four of the past five years, PolitiFact's Lie of the Year has revolved around the health care law, which has been subject to more erroneous attacks than any other piece of legislation PolitiFact has fact-checked.

Obama's ideas on health care were first offered as general outlines then grew into specific legislation over the course of his presidency. Yet Obama never adjusted his rhetoric to give people a more accurate sense of the law's real-world repercussions, even as fact-checkers flagged his statements as exaggerated at best.

Instead, he fought back against inaccurate attacks with his own oversimplifications, which he repeated even as it became clear his promise was too sweeping.

The debate about the health care law rages on, but friends and foes of Obamacare have found one slice of common ground: The president's "you can keep it" claim has been a real hit to his credibility.

Perhaps it wasn't a lie, but Obama's claim that the website would be like navigating on Orbitz has to be right up there at the top of Obama false claims about the ACA.

Stay tuned - more Obamacare lies sure to be on the way as the meltdown continues.