In reality it will go down as his biggest failure.

Via CNN:

[T]he glitches aside, Obama remained confident the Affordable Care Act, passed along party lines in 2010, would form a large part of his presidential legacy.

“I continue to believe and I’m absolutely convinced that, at the end of the day, people are going to look back at the work we’ve done to make sure that in this country, you don’t go bankrupt when you get sick, that families have that security,” Obama told Walters. “That is going be a legacy I am extraordinarily proud of.”

That legacy – and what can be done while he’s still in office to bolster it – does weigh on the president’s mind, he admitted.

“Every president in their second term is mindful that you’ve only got a limited amount of time left,” Obama said. “You want to make sure that you are squeezing every last ounce of energy that you have to try to deliver on the commitments you made to the American people.”