A major foreign-policy summit is underway in Quebec today, with the Liberals welcoming foreign ministers from the U.S., Europe and Japan.

Prime Minister Justin Trudeau says Moscow can't be trusted in any agreement to end its invasion of Ukraine, as European leaders craft plans to rely less on Washington and protect the continent from more incursions by Russian President Vladimir Putin.

Trudeau said he would raise matters with the King that are most important to Canadians, adding that Canada's sovereignty and independence seem to be atop the public's mind.

"We could potentially use (this) as a way of signalling the seriousness with which the Government of Canada is viewing this unwelcome talk," said University of Victoria international relations professor Will Greaves.

Canada's aid sector is bracing for cataclysmic suffering worldwide, and is asking Ottawa to help fill gaps as Washington winds down the U.S. Agency for International Development.

U.S. President Donald Trump's "America First" changes to foreign policy could have drastic consequences for Canada's approach to aid, trade, intelligence and diplomacy.

Conservative Leader Pierre Poilievre gave a lengthy interview to psychologist and media personality Jordan Peterson, touching on his vision for Canada and how he plans to implement it.

Canada is trying to push the world's nations to stick with the goals they set to confront the planet's main challenges, despite rising geopolitical confrontation that has made the 2030 deadlines more difficult to meet.

The rotating presidency involves a series of meetings across the hosting country for senior officials of G7 countries, who co-ordinate policies ranging from defence to digital regulation. Some meetings involve civil society groups, business leaders and organized labour.

"We have a U.S. president(-elect) with a strong mandate, who is a powerful negotiator who can spot weakness from a mile away," Conservative Leader Pierre Poilievre said Tuesday.