(CNN) Former President Barack Obama on Wednesday tweeted his support for Justin Trudeau, urging Canadians to reelect their Prime Minister in Monday's federal election.

"I was proud to work with Justin Trudeau as President," Obama tweeted . "He's a hard-working, effective leader who takes on big issues like climate change."

He continued, "The world needs his progressive leadership now, and I hope our neighbors to the north support him for another term."

I was proud to work with Justin Trudeau as President. He's a hard-working, effective leader who takes on big issues like climate change. The world needs his progressive leadership now, and I hope our neighbors to the north support him for another term. — Barack Obama (@BarackObama) October 16, 2019

Obama's support continues the pair's friendship from when the former US president sat in the Oval Office. It comes as Trudeau runs a competitive race against Conservative leader Andrew Scheer and in the aftermath of Trudeau's recent blackface controversy.

Last month, Time magazine surfaced photos of Trudeau wearing brownface when he was a schoolteacher in 2001. In his apology, Trudeau admitted he had put on dark makeup when he was in high school as part of a talent show in which he sang the traditional Jamaican folk song "Day-O."

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