The economist Mark Carney was the favorite tip before the party members were to cast their votes, and he received support equivalent to 86 percent of the votes.
The soon-to-be 60-year-old Carney is described as a political novice, but has previously led both Canada's and the UK's central banks.
Wants to stop Trump
For Carney, the challenge awaits to defend Canada from Donald Trump's repeated attacks, where the American president, among other things, has said he wants to transform his independent neighbor to the north into the 51st state of the USA.
Donald Trump, as we know, has imposed unmotivated tariffs on what we build, on what we sell, and on how we make a living. He attacks Canadian families, workers, and businesses, says Carney in his first speech as party leader.
We cannot let him succeed, and we will not do so, continues the incoming prime minister.
Carney further emphasized that Canada will maintain its retaliatory tariffs against the USA until "the Americans show us respect."
Election later this year
General elections await Canada later this year, where the rival Conservative Party currently appears to have an advantage.
Justin Trudeau announced his resignation in January, following growing discontent both internally within the party and among the Canadian population.
Canadians face an existential challenge from our neighbor, said Trudeau to party members during his resignation speech in Ottawa on Sunday.