(CNN) - Mitt Romney hit New Hampshire airwaves Wednesday with a one-minute radio spot blasting President Barack Obama for failing to deliver on his 2008 campaign promises.
The ad, called "American Optimism," used clips of Obama campaigning in 2008 spliced with Romney delivering lines from his stump speech.
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"He said he would repair the nation and repair the world," Romney said in the ad. "And then across the nation, he went on and promised that he would put Americans back to work."
Romney highlighted a remark Obama made in Iowa during his campaign there in 2007, when he told a crown in Davenport: "This is our moment. This is our time."
"Well Mr. President, you've had your moment," Romney retorted. "We have seen the results. And now, Mr. President, this is our time."
The radio ad underscores Romney's plan to go after Obama hard in upcoming campaign speeches, particularly in New Hampshire, where polling shows him running far ahead of his closes.
Romney said on CNN Wednesday, "I continue to believe the right place to focus is on President Obama. Of course, people are going to ask us about the differences on our positions on issues and backgrounds and so forth, but, really, if we talk about what the American people want to hear, it's how we're going to be different than President Obama when it comes to getting the economy going, preserving America's security abroad and making sure we rein in the scale of the federal government."