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| Good morning. It’s Monday, Feb. 23, and we spent way too much time this weekend thinking about this lonely baby monkey. Now let’s get to the news.  | Mexico’s most powerful drug kingpin was killed by the nation’s security forces. | | | The U.S. Embassy warned U.S. citizens in Jalisco and Tamaulipas states, and parts of three other states, to shelter in place. (Ulises Ruiz/AFP/Getty Images) | - Who? “El Mencho,” the head of the Jalisco New Generation Cartel. His killing yesterday set off violence in areas controlled by the cartel, with reports of burning cars blocking roads.
- Zooming out: The killing was a major show of force by Mexico as President Donald Trump continues to pressure the nation to do more to fight drug trafficking organizations.
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 | An armed man was shot and killed at Mar-a-Lago, the Secret Service said. | - The incident: Secret Service agents and a sheriff’s deputy fatally shot the man after he entered the perimeter of Trump’s estate in Florida. Trump was not there this weekend.
- The latest: The man was identified as 21-year-old Austin Tucker Martin. An Instagram account that appears connected to Martin heavily features illustrations of golf courses.
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 | Sixty percent of Americans disapprove of Trump’s job performance. | | | Source: Washington Post-ABC News-Ipsos polls. Latest poll conducted Feb. 12-17. (The Washington Post) | - Digging deeper: Significant majorities also said they disapprove of how Trump is handling the economy, tariffs and relations with other countries, according to this new poll.
- Looking ahead to the midterms: House Democrats are targeting these districts Trump easily won in 2024.
- Over the weekend: Trump announced new global tariffs after the Supreme Court struck down most levies he put in place last year. See what it all means for your wallet here.
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 | A powerful nor’easter dumped feet of snow on the Mid-Atlantic and Northeast. | | | At least seven states, including New York, have declared states of emergency. (Charly Triballeau/AFP/Getty Images) | - This morning: Around 35 million people from Maryland to Maine remained under blizzard warnings, as flights were delayed and households reported power outages.
- What’s to come: The storm will depart northern New England by tomorrow, but more storms could hit the Northeast this week. Find forecasts for major East Coast cities here.
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 | The U.S. economy’s dependence on AI may have been overstated, experts say. | - In 2025: It became conventional wisdom that AI was a major driver of growth. But some prominent economists calculate that it contributed as little as 0% to economic gains.
- AI power struggle: The Pentagon’s rush to embed artificial intelligence across combat operations has exposed tensions with Anthropic, one of the nation’s leading AI firms.
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 | Some causes of autism could be preventable, new research suggests. | - The “1,300-day window”: Scientists are probing how exposure to toxins, stress and infections before conception through a child’s second birthday might impact development.
- One theory: A recent study suggested more than half of autism cases could be prevented with the right interventions. But such studies are raising uncomfortable ethical questions.
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 | The U.S. men’s hockey team ended its 46-year Olympic drought yesterday. | | | The Americans defeated Canada in Milan to capture their first Olympic gold in men’s hockey since 1980. (Elsa/Getty Images) | | Before you go … ever heard of “jeffing”?
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Jamie Ross and 
