Some would say the whole presidency has been a big MISTAKE!
check this out:

President Obama rued the rollout of the healthcare website as his biggest mistake of the year during a White House news conference Friday, underlining the extent to which the issue has overshadowed everything else during a dismal 2013 for the 44th president.

Asked about his worst error, Obama said that he had stressed the need for consumers to have “a good experience, an easy experience” in the run-up to the launch of HealthCare.Gov.

He continued: “The fact is it didn’t happen in the first month, first six weeks, in a way that was at all acceptable. And since I’m in charge, obviously we screwed it up.”