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... President Donald Trump is privately ramping up his focus on another target in the Western Hemisphere, increasingly complaining to aides in recent weeks about Canada's vulnerability to U.S. adversaries in the Arctic, according to two U.S. officials, a senior administration official and three former senior U.S. officials familiar with the discussions.

As Trump's advisers work toward his goal of acquiring Greenland, the president has privately grown more exercised about what he sees as Canada's similar inability to defend its borders against any encroachment from Russia or China, specifically arguing Canada needs to spend more on defense, the officials said. ...