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If you want to understand the ruins of President Trump’s foreign policy, look no further than Canada. Trump tried to strong-arm America’s trading partner and closest ally with punishing tariffs and threats of becoming the “51st state” in order to extract more concessions. The result? A recent poll found that 41 percent of Canadians now consider the United States an enemy country. Prime Minister Mark Carney is pursuing closer trade ties with China and Europe in order to diversify away from the U.S. And in August, he walked away from trade talks with the Trump administration, barreling our two countries toward a Jan. 1 deadline when huge new tariffs will go into effect. Trump’s theory of power appears to have failed here because Canada — even though it’s the weaker party — simply refused to capitulate. There’s a broader lesson in that. Chrystia Freeland served in a number of senior roles in the Canadian government, including deputy prime minister, minister of finance, and minister of foreign affairs, where she…

The gargantuan bet on the future of A.I. is driving the U.S. stock market and economic growth. And the building of data centers is sucking up so many construction resources, it’s crowding out the construction of homes. The multitrillion-dollar question is: Will this bet pay off? Or is it a bubble, destined to burst and pull the economy down with it? Paul Kedrosky is a partner at SK Ventures, a fellow at M.I.T., and the author of a newsletter about A.I.. He thinks we’re very obviously in a bubble. Azeem Azhar is a technology entrepreneur and the author of the newsletter Exponential View. He has a more optimistic take. (The New York Times has sued OpenAI and Microsoft claiming copyright infringement. The companies have denied those claims.)

Roughly half of American adults are using chatbots. Nearly one in five U.S. adults has chatted with an A.I. that simulates a romantic partner. And some children now struggle to distinguish between talking to chatbots and humans. What does this mean for the future of our relationships? Turkle has been studying relationships between humans and machines since the 1970s, around the dawn of the personal computer. Her 2011 book, “Alone Together,” offered a prescient warning about how social media was atrophying in-person bonds. And in her latest book, “Artificial Intimacy: Who We Become When We Talk to Machines,” Turkle turns the lens on A.I., wrestling with what happens when technology comes after not only our attention but also our capacity for attachment.

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Every Tuesday and Friday, Ezra Klein invites you into a conversation about something that matters. How do we address climate change if the political system fails to act? Has the logic of markets infiltrated too many aspects of our lives? What is the future of the Republican Party? What do psychedelics teach us about consciousness? What does sci-fi understand about our present that we miss? Can our food system be just to humans and animals alike? Subscribe wherever you listen to podcasts. You can find transcripts (posted midday) and more episodes of "The Ezra Klein Show" at nytimes.com/ezra-klein-podcast, and you can find Ezra on Twitter @ezraklein. Thoughts? Guest suggestions? Email us at ezrakleinshow@nytimes.com. “The Ezra Klein Show” is produced by Rogé Karma and Jeff Geld; fact-checking by Michelle Harris; original music by Isaac Jones; mixing by Jeff Geld.