Washington (CNN) - Three days after her widely-reported gaffe, Rep. Michele Bachmann explained it by essentially saying: I made a mistake, but the media's reporting of it proves bias.
Bachmann made the comments on Tuesday during an interview on the conservative Laura Ingraham radio show.
On Saturday at an engagement in Manchester, Bachmann said of New Hampshire, "You're the state where the shot was heard around the world at Lexington and Concord."
The battles of Lexington and Concord in 1775 were fought in Massachusetts, not New Hampshire.
In Tuesday's radio interview, Bachmann accepted blame for her bungling of a basic historical fact.
"I made a mistake," she said. "I should've said Massachusetts instead of New Hampshire."
The Minnesota Republican was then asked if she was surprised by news reports on the gaffe.
"No, not at all," Bachmann told the interviewer. "We all know that there's a double standard in the media."
Bachmann highlighted moments when President Barack Obama misspoke as a candidate. In one instance, in May 2008, then-Sen. Obama said, "Over the last 15 months, we've traveled to every corner of the United States. I've now been in 57 states? I think one left to go."
Later in the day, Obama told reporters that he misspoke.
Bachmann suggested that helps prove a liberal media bias.
"Of course, that wasn't considered newsworthy," she said of Obama's remarks. "The 3,400 members of the mainstream media are a part of the Obama press contingent."
"So it doesn't matter which conservative is out there, if an error is made, in any way, that is what is stated. They didn't talk about the great crowds, the standing ovations, the wonderful time that we had in New Hampshire. And that is just the way that it goes."