I'm starting to think that covering American politics is far easier than covering Canadian politics. But trying to cover the interplay between them both? A challenge of an entirely different magnitude.

This NAFTA story offers no easy answers, no obvious heroes, and a passel of possible villains pointing their fingers at each other.

Here's the latest from the Canadian Press:

Democratic presidential hopeful Hillary Clinton never gave Canada any secret assurances about the future of NAFTA such as those allegedly offered by Barack Obama's campaign, Prime Minister Stephen Harper's office said Friday.

With the NAFTA affair swirling over the U.S. election and Canadian officials skittish about saying anything else that might influence the race, it took the PMO two days to deliver the information.

After being asked whether Canadian officials asked for — or received — any briefings from a Clinton campaign representative outlining her plans on NAFTA, a spokeswoman for the prime minister offered a response Friday.

"The answer is no, they did not," said Harper spokeswoman Sandra Buckler.

That response will come as a relief to the Clinton campaign, which has angrily denied that it has engaged in the kind of double-talking hypocrisy of which it accuses Mr. Obama.