Trudeau was elected as Canada's prime minister in 2015, when he was 43. Like Rajiv Gandhi, he had a strong family connection to the office. His father, Pierre Trudeau, also served as prime minister.
AP
Justin Trudeau, Canada
FILE - In this Feb. 13, 2017, file photo, Canadian Prime Minister Justin Trudeau speaks during a joint news conference with President Donald Trump in the East Room of the White House in Washington. A pair of Syrian refugees have named their newborn baby boy for Trudeau to thank him for the country's refugee policy. (AP Photo/Pablo Martinez Monsivais, File)
John F. Kennedy, 43, assassinated Nov. 22, 1963, was the youngest person ever elected to the U.S. presidency. Emmanuel Macron, who is 39 years…
