Despite the Obama campaign's denials, CTV, the Canadian news outlet that reported that a senior campaign official had assured the Canadian ambassador that Obama's tough talk on NAFTA was just "campaign rhetoric," isn't backing off the story:

On Wednesday, CTV reported that a senior member of Obama's campaign called the Canadian government within the last month -- saying that when Senator Obama talks about opting out of the free trade deal, the Canadian government shouldn't worry. The operative said it was just campaign rhetoric not to be taken seriously.

The Obama campaign told CTV late Thursday night that no message was passed to the Canadian government that suggests that Obama does not mean what he says about opting out of NAFTA if it is not renegotiated.

However, the Obama camp did not respond to repeated questions from CTV on reports that a conversation on this matter was held between Obama's senior economic adviser -- Austan Goolsbee -- and the Canadian Consulate General in Chicago.

Earlier Thursday, the Obama campaign insisted that no conversations have taken place with any of its senior ranks and representatives of the Canadian government on the NAFTA issue. On Thursday night, CTV spoke with Goolsbee, but he refused to say whether he had such a conversation with the Canadian government office in Chicago. He also said he has been told to direct any questions to the campaign headquarters....

But on Wednesday, one of the primary sources of the story, a high-ranking member of the Canadian embassy, gave CTV more details of the call. He even provided a timeline. He has since suggested it was perhaps a miscommunication...

Sources at the highest levels of the Canadian government -- who first told CTV that a call was made from the Obama camp -- have reconfirmed their position.

What's missing here is whether Goolsbee was relating his personal opinion or the campaign's.

(h/t Geraghty)