With the Capitol in the background, Republican presidential candidate, former Massachusetts Gov. Mitt Romney speaks about the Supreme Court's health care ruling, Thursday, June 28, 2012, in Washington. (AP Photo/Charles Dharapak)

WOLFEBORO, N.H. -- Contradicting one of his senior advisers, Mitt Romney said Wednesday, July 4, that the individual mandate in President Barack Obama's health care plan is a tax, and stands as evidence that Obama has broken a promise not to raise taxes on the middle class.

Just two days earlier, campaign spokesman Eric Fehrnstrom said Romney agreed with Obama that the individual mandate was a penalty, not a tax -- despite the Supreme Court ruling that the law was constitutional precisely because it was a tax.

Fehrnstrom said Romney "agreed with the dissent, which was written by Justice (Antonin) Scalia, and the dissent clearly stated that the mandate was not a tax." The Scalia dissent said the health care plan was unconstitutional because it violated the Commerce Clause of the Constitution. The court's majority agreed that it violated that clause, but said it was legal because Congress had a separate power to impose taxes.

Fehrnstrom's comments caused consternation among many Republicans, who believed that the Supreme Court had handed Obama a gift when it used the tax argument to justify upholding the health care plan. In an interview with CBS News on Wednesday, Romney backed off from his adviser's remarks.

Asked about the Supreme Court ruling, Romney said that "while I agreed with the dissent, that's taken over by the fact that the majority of the court said it was a tax and therefore it is a tax. They have spoken."

He went on: "There's no way around that.

The remarks, coming during Romney's vacation at his New Hampshire vacation home, were the second time in recent months that the candidate has been forced to do damage control after controversial remarks by Fehrnstrom.

In March, as Romney closed in on the Republican nomination, Fehrnstrom suggested that the campaign would move more toward the political center in the general election. In words that brought undisguised glee to the Obama campaign, he said: "Well, I think you hit a reset button for the fall campaign. Everything changes. It's almost like an Etch A Sketch. You can kind of shake it up and restart all over again."

Romney was quick to assure conservatives that that wouldn't be the case.

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Health care mandate is a tax, Romney says