More than a half-century ago, Pierre Trudeau's Liberals launched a foreign-policy review. It dealt with every region of the world but failed to address an issue of growing concern to Canadians at the time: how to deal with our rapidly growing economic dependence on the United States and our increasing vulnerability to its overwhelming presence in our economy. Similar concerns will no doubt occupy Prime Minister Justin Trudeau when he visits Washington in March. Published in the Commentary section of the Globe and Mail.