TORONTO (AP) - Canadian Prime Minister Justin Trudeau acknowledged that he let down his supporters - and all Canadians of colour - by appearing years ago in brownface and blackface. Yet the scandal's fallout may be limited in a country without the harsh and still-divisive racial history of the neighbouring United States.

"I hurt people who in many cases consider me an ally," Trudeau told a news conference on Friday (Sept 20). "I let a lot of people down."

Trudeau, 47, is seeking a second term as prime minister in an Oct 21 election. His leading opponent, Andrew Scheer of the Conservative Party, has assailed him as "not fit to govern" because of the revelations. But key figures in the prime minister's Liberal Party have stuck by him, including Foreign Minister Chrystia Freeland, who would be a favourite to replace Trudeau as Liberal leader if he lost the election.

Many minority Canadians, increasingly active in politics and government, seem ready to forgive Trudeau.

"As I have gotten to know Justin, I know these photos do not represent the person he is now, and I know how much he regrets it," Defence Minister Harjit Sajjan, a Sikh, said on Twitter.

Nelson Wiseman, a political science professor at the University of Toronto, predicted Trudeau would easily weather the scandal.

"Indeed, I think he is drawing some sympathy," Wiseman said. "This affair is a media bombshell that is bombing with the public... The international media love this story because it goes against type."

Wiseman also disputed the assertion that Trudeau is a hypocrite when it comes to race and diversity, noting that his Cabinet is the most diverse in Canadian history in terms of gender and ethnic background.

Trudeau's brownface controversy has drawn some comparisons with developments earlier this year in the US, where Virginia Governor Ralph Northam withstood intense pressure to resign after a racist picture surfaced from his 1984 medical school yearbook.

Quentin Kidd, a political science professor at Virginia's Christopher Newport University, said the revelations were "a shock and disappointment" to supporters of both Trudeau and Northam, whom they viewed as compassionate politicians.

However, Kidd sees big differences in how the two politicians handled the situation.

"Trudeau has expressed genuine contrition and willingness to accept what he did as racist," Kidd said. "We haven't seen that from Ralph Northam." Kidd also cited the divergent racial histories of the two countries.

"Canada has its issues dealing with racial inequities, but nothing like the American South. There's no legacy of slavery, of Jim Crow or huge gaps in wealth and poverty," he said. "Northam has to carry the baggage of that history, whereas Trudeau doesn't have to carry similar baggage."

According to recent census figures, Canada's population is about 73 per cent white, compared with 77 per cent in the US. Many of the non-whites in Canada are from Asia. Only about 3.5 per cent of the population is black.

In Trudeau's multi-ethnic parliamentary district in Montreal, some residents questioned about the scandal offered a collective shrug.

"It was no big deal, it was a long time ago," said Zahid Nassar, an immigrant from Pakistan. "When we're young, we all do stupid things." Nassar said he voted for Trudeau in 2015 and will likely do the same next month. If he does not, he said, it will be because he's worried about safety in his neighbourhood.

The brownface controversy surfaced on Wednesday when Time magazine published a photo from a yearbook from the West Point Grey Academy, a private school in British Columbia where Trudeau worked as a teacher.

It shows the then-29-year-old Trudeau at an "Arabian Nights" party in 2001 wearing a turban and robe with dark make-up on his hands, face and neck. Trudeau said he was dressed as a character from "Aladdin".

Trudeau said he also once darkened his face for a performance of a Harry Belafonte song during a talent show when he was in high school. In a third incident, a brief video surfaced of Trudeau in blackface. He said it was taken on a costume day while he was working as a guide for a river rafting company.

"I have been forthright about the incidents that I remembered," he said on Friday. "I did not realise at the time how much this hurt minority Canadians, racialised Canadians."

Sunny Khurana, who was photographed with Trudeau for the 2001 yearbook, said no one had a problem with Trudeau's get-up at the event.

"It was a costume party, Arabian nights, Aladdin," said Khurana, a Sikh Indian who had two children at the school at the time. "That's it. People dress up. It was a party. It was never meant to put down anybody."

In Washington, US President Donald Trump was asked by a reporter about the Trudeau controversy. "I was hoping I wouldn't be asked that question," Trump replied. "I'm surprised. And I was more surprised when I saw the number of times."

Trudeau was later asked if his standing internationally is damaged.

"My focus is Canadians who face discrimination every day," he replied. "I'm going to work very hard to demonstrate as an individual and as a leader I will continue to stand against intolerance and racism."

Trudeau said he would call the leader of the opposition New Democrat party, Jagmeet Singh, and apologise for wearing brownface. Singh is also a Sikh.

As for Trudeau's main election rival, his denunciation of the prime minister was undercut by comments he made shortly before the brownface photo surfaced.

Scheer said he would stand by other Conservative candidates who had made racist or anti-gay comments in the past, as long as they apologised and took responsibility for those remarks.

"I accept the fact that people make mistakes in the past and can own up to that and accept that," Scheer said. "I believe many Canadians, most Canadians, recognise that people can say things in the past, when they're younger, at a different time in their life, that they would not say today."