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OTTAWA — Prime Minister Justin Trudeau announced Monday he will resign as prime minister and Liberal leader once the party chooses a successor. Trudeau, who was first elected Oct. 19, 2015, steps down after nearly a decade in power.

Here is a roundup of stories from The Canadian Press designed to bring you up to speed...

VANCOUVER — A study into the behaviour of a sea sponge off the coast of British Columbia has revealed the animals have the humanlike ability to sneeze.

OTTAWA — Attention is turning quickly in Ottawa to who will replace Justin Trudeau who announced Monday he will step aside as prime minister and Liberal leader as soon as a new leader is chosen.

OTTAWA — As a tearful Justin Trudeau outlined his plans to resign as Liberal leader and prime minister on Monday, he put the country on track for an early election featuring a new party flagbearer for the first time in a decade.

OTTAWA — Prime Minister Justin Trudeau is stepping down as Liberal leader after almost a decade at the helm of the party.

OTTAWA — Prime Minister Justin Trudeau addressed media this morning from his residence in Ottawa to announce that he will step down as Liberal leader once his party selects a replacement.

OTTAWA — Prime Minister Justin Trudeau will leave the world stage with a legacy of promoting feminist causes and focusing on Asia, along with criticism that Canada's actions fell short of the government's rhetoric.

WASHINGTON — The difficult diplomacy Canada is attempting with the incoming Trump administration took on new pressure Monday as Prime Minister Justin Trudeau announced he will resign his post as soon as a new Liberal leader is chosen.

MONTREAL — Justin Trudeau has started each of his three terms as prime minister the same way: visiting Montreal's Jarry metro station the morning after the election to personally thank the residents of his riding for their support.