Prime Minister Justin Trudeau says Mexico has been a “solid partner” in North American trade negotiations, but acknowledged that Donald Trump’s concerns about Chinese investment in its economy need to be addressed. Trudeau was walking a delicate line at the Asia-Pacific Economic Cooperation (APEC) meeting in Lima, Peru Saturday, as world leaders continue to grapple with Trump’s re-election and the prospect of four years of Republican rule in the United States.“Mexico was a solid partner in advancing the priorities of Canadians, of the priorities and interests of workers across North America,” in the last round of trade negotiations with the…