Sarasota, Florida (CNN) - GOP presidential nominee Mitt Romney launched a new line of attack against President Barack Obama on Thursday, seizing on comments Obama made about change in Washington earlier in the day.
"The most important lesson I've learned is that you can't change Washington from the inside. You can only change it from the outside," Obama said Thursday afternoon at a presidential forum the candidate taped to run on the Spanish-language network Univision.
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Change was the theme of the candidate's 2008 campaign slogan, and he said at the Thursday forum that change from the outside was essential for his election and policy.
"That's how I got elected, and that's how the big accomplishments like health care got done, was because we mobilized the American people to speak out," he said. "That's how we were able to cut taxes for middle-class families. So something that I'd really like to concentrate on in my second term, is being in a much more constant conversation with the American people so that they can put pressure on Congress to help move some of these issues forward."
Within hours, GOP presidential candidate Mitt Romney had seized on the comments. Standing before a sign that declared he would "protect and strengthen" Medicare, Romney instead peppered his speech with references to Obama's comment.
"The president today threw in the white flag of surrender again. He said he can't change Washington from inside, he can only change it from outside," Romney thundered to an audience of several thousand in Sarasota. "Well, we're going to give him that chance in November. He's going outside!"
Romney said he "couldn't believe it" when he heard reports the "president of change" had said Washington needed to be changed from the outside.
"Isn't that amazing? No wonder he's had such a hard time over the last four years," Romney said. "His first two years he had a Democratic House, Democratic Senate, he got to do whatever the heck he wanted to, but he says he can't change it from the inside. Well, I will."
Obama's campaign responded to Romney's remarks on social media, tweeting quotes of prior Obama statements about change coming from outside of Washington.
"'This campaign can't only be about me. It must be about us-it must be about what we can do together.' -Barack Obama, 1/10/07," Obama's campaign account posted.
And another post: "'The change we need doesn't come from Washington. Change comes to Washington. Change happens because the people demand it.' -Obama, 8/28/08."
The campaign also released a web video of comments Obama has made on the campaign trail this year - and to make their point that Romney was taking Obama out of context, the video takes comments of Romney out of context.
"America's role as leader in the world is a thing of the past," he is seen saying in one of the clips. It removes critical words from around that bite, as Romney regularly makes the opposite point in his stump speeches.
The Republican White House hopeful did take aim at Obama over Medicare, claiming $1.4 billion marked for Medicare recipients in Sarasota would be used to pay for the president's health care plan.
"What he has done to Medicare to pay for Obamacare is wrong," Romney said during the sunny, outdoor rally, where several elderly supporters had to be ushered out in the heat. "I will reverse it. I will save Medicare and protect it for our seniors of today and our seniors of tomorrow."
But at the end of his speech Romney returned again to his theme of the afternoon: "I will change Washington and I will do it from the inside when you elect me on Nov. 6."
- CNN's Kevin Liptak and Adam Aigner-Trewordy contributed to this report