As we move closer to the U.S. election, CTVNews.

ca will be examining the relationship between Canada and the U.S. in a series of features.

On Monday, former U.S. president Donald Trump repeated the false claim that Fidel Castro could be Prime Minister Justin Trudeau's real father.

While Trump frequently expresses his love for Canada, he has previously taken aim at Trudeau for being "two faced," "weak" and a "far left lunatic." "Personal dynamics between presidents and prime ministers have always mattered," Carleton University political scientist Aaron Ettinger told CTVNews.ca in an email.

"If Trump is elected and Trudeau remains Prime Minister, they would be restarting the relationship from a place of mistrust." The information you need to know, sent directly to you: Download the CTV News App Here's a look at Trump's latest jab and what he has publicly said about Trudeau: 'The son of Fidel Castro' During an online interview on Monday , Trump repeated the false claim about the late Cuban revolutionary leader, who enjoyed a warm relationship with Trudeau's parents. "He's turned very liberal, actually they say he's the son of Fidel Castro, and could be," Trump told streamer Adin Ross.

"Anything's possible in this world, you know?" The debunked theory was shared widely after Castro's 2016 death when Trudeau was criticized for remarks praising the communist dictator. Former Canadian prime minister Pierre Trudeau and wife Margaret made a controversial Cold War trip to Cuba in 1976,.