Video of Justin Trudeau discussing the 'difficult ups and downs' in his marriage re-emerges after his split with wife Sophie

• Canadian Prime Minister Justin Trudeau and his wife announced their separation on Wednesday.
• A resurfaced interview shows Trudeau discussing the "difficult ups and downs" in their relationship.
• The couple were married for 18 years and have three children together. 

A video of Canadian Prime Minister Justin Trudeau discussing the "difficult ups and downs" in his marriage has re-emerged after his split from his wife, Sophie Grégoire Trudeau.

In an interview with the Canadian Broadcasting Corporation in October 2014, Trudeau — who was not yet prime minister — talked candidly about his marriage and the demands that politics put on his family.

"I have a very difficult, high-pressured job," Trudeau said in the interview. "Everyone knows how challenging it is to balance family responsibilities with a job that takes me across the country and working extremely hard."

"There are times when she hates my job and she hates me for loving my job," he said about his wife, adding: "There are times ... when she understands how much of an opportunity and a responsibility it is for us to actually serve this country that has given us so much."

Trudeau then goes on to say that his marriage "isn't perfect", adding: "We have had difficult ups and downs, yet Sophie remains my best friend, my partner, my love. We are honest with each other, even when it hurts."

Asked by the reporter if that's "coded language for extramarital affairs," Trudeau responded: "No."

Trudeau and Grégoire Trudeau, a former television presenter, were married in Montreal in 2005 and have three children together, aged 15, 14, and 9 years old.

In a 2015 interview, Grégoire Trudeau refused to address allegations of an affair. 

"Ask if whatever happened in our lives — I'm not saying it did or didn't — as if we would answer that," Grégoire Trudeau told Canada's Globe and Mail.

She added:"'I can tell you right away that no marriage is easy. I'm almost kind of proud of the fact that we've had hardship, yes, because we want authenticity. We want truth." 

The Canadian prime minister announced a split with his wife in a statement uploaded to Instagram on Wednesday.

"Sophie and I would like to share the fact that after many meaningful and difficult conversations, we have made the decision to separate," the statement said.

"As always, we remain a close family with deep love and respect for each other and for everything we have built and we will continue to build," it added. "For the well-being of our children, we ask that you respect our and their privacy."

The couple were childhood friends but officially started dating in 2003 after crossing paths at a charity event in Montreal. They married in 2005 and Trudeau became Canada's 23rd prime minister 10 years later.