(CNN) – President Barack Obama's re-election campaign will spend $25 million in May on ads in 12 battleground states released Monday, according to senior campaign adviser David Axelrod.
In addition to the large figure behind the positive spots, Axelrod said the campaign would respond to "attacks" from Mitt Romney's presidential campaign and the super PACs supporting his candidacy.
Read more about the ads: Obama campaign seeks to frame the narrative with new ads
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"We're going to treat every one of them as what they are, which is an adjunct to the Mitt Romney effort, and we're going to be tough about that even as we make our positive case … to the American people," Axelrod said on a conference call Monday with reporters. "And we'll wait and see if he can make a positive case to the American people and not just argue that the country has gone through a tough time and therefore elect me president."
Responding to the Obama campaign conference call, Romney spokeswoman Amanda Henneberg said "President Obama would like for voters to believe he hasn't been president for the last three years."
"Americans are disappointed in President Obama's liberal policies that haven't made their lives any better. President Obama just hasn't lived up to his promises," Henneberg said in a statement.