(CNN) – Mitt Romney's national campaign co-chair John Sununu apologized Tuesday afternoon for questioning President Barack Obama patriotism earlier in the day.
Appearing on CNN's "The Situation Room with Wolf Blitzer," Sununu said he regrets using those words.
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"I'm apologizing for using those words," said Sununu. "I did say those words that were there and, frankly, I made a mistake."
Sununu harshly criticized Obama's leadership in a conference call with reporters and saying he wished "this president would learn how to be an American."
The conference call came on the heals of the Obama campaign's continued attacks on presumptive GOP nominee Mitt Romney's business record and reluctance to release more tax returns.
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