President Donald Trump is as volatile as ever, keen to leverage the latest irritation to the American public against Canada. Canada had constructed the bridge with its own funds, the agreement being it would split toll revenue with Michigan after the bridge debts were paid for. Last year, there was a whole month where the news cycle revolved around frenzied talk of reducing internal trade barriers plaguing Canada. While you can't totally erase all internal trade barriers without eliminating actual provinces, there was a clear sense that the status quo wasn't working. Those shortcuts have only bought room for Carney to erect new barriers: for example, he agreed earlier this month to let B.C.