Canada’s oil, minerals and water make it a notable resource hotbed from Donald Trump’s perspective.MANDEL NGAN/AFP/Getty Images

Thomas Homer-Dixon is executive director of the Cascade Institute at Royal Roads University and professor emeritus at the University of Waterloo.

Adam Gordon served as the senior legal and policy adviser to Canada’s Minister of Foreign Affairs and is currently an affiliated researcher at the Cascade Institute.

So, this is the “peace president?”

Donald Trump promised that under his leadership the U.S. would eschew “nation building,” “forever wars,” “regime change,” and violent foreign engagements more generally.

Yet since his second inauguration, he’s ordered military action in Syria, Yemen, Somalia and Iraq; bombed Iran’s nuclear weapons complexes; and blown up more than a score of boats allegedly carrying drugs in the Caribbean. In just the past two weeks, he has launched missiles against Islamic terrorists in northern Nigeria, declared that the U.S. was “locked and loaded” for another attack on Iran, and now decapitated Venezuela’s government.

In this context, Canadians must acknowledge the real risk that Mr. Trump will use military coercion against our country.

It’s important to connect three recent data points. First, in his press conference on Saturday, Mr. Trump explicitly stated that the Venezuela operation’s aim was to secure access to........

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