Donald Trump is not the first U.S. president to want to claim or annex Canada. But it backfired last time. You’re reading an excerpt from the WorldView newsletter. Sign up to get the rest free, including news from around the globe and interesting ideas and opinions to know, sent to your inbox on Mondays, Wednesdays and Fridays.

Under Trump's flip-flopping raft of tariffs, Washington placed a 10 percent tariff on Canadian energy, the major supplier to U.S. states hugging the northern border. Ford has pledged retaliatory 25 percent tariffs on Canadian electricity sent to the U.S. states of New York, Minnesota and Michigan from Ontario, to take effect on Monday.