Pictures of Justin Trudeau wearing blackface or brownface - widely accepted as racist caricatures - have landed like a bombshell in the Canadian election campaign. What does this mean for his chances of winning?
A contrite Justin Trudeau admitted that he never told anyone about his history of dressing in blackface or brownface - not even the Liberal party members first vetting his candidacy.
In his lengthy second mea culpa since the scandal broke, he said he was too embarrassed about the incidents to raise them with anyone. He also conceded that he couldn't rule out more instances coming to light, noting he had no recollection of one of the occasions now in the public domain.
Mr Trudeau said at the time, he didn't understand the hurt his actions could cause, because of "the layers of privilege that I have".
Shachi Kurl, a pollster with the Angus Reid Institute, called the release of the images and footage a "massive cannonball" that could strike at the core of Mr Trudeau's brand.
Steve Simmonds