China Challenges Silicon Valley for A.I. Dominance

Elon Musk and his team have taken a hacksaw to the federal bureaucracy one agency at a time, and the question has become whether he’s on a crusade that will leave the government paralyzed or deliver a shake-up it has needed for years. Jonathan Swan, a White House reporter for The New York Times, takes us inside this hostile takeover of Washington.

North America came within hours of a multibillion dollar trade war that was poised to hobble the economies of Mexico and Canada. The Times journalists Ana Swanson, Matina Stevis-Gridneff and Simon Romero discuss the last-minute negotiations that headed off the crisis — for now.

Here’s a strange story: One day two summers ago, Jennifer Kahn woke up because her arms — both of them — hurt. Not the way they do when you’ve slept in a funny position, but as if the tendons in her forearms and hands were moving through mud. What felt like sharp electric shocks kept sparking in her fingers and sometimes up the inside of her biceps and across her chest. Holding anything was excruciating: a cup, a toothbrush, her phone. Even doing nothing was miserable. It hurt when she sat with her hands in her lap, when she stood, when she lay flat on the bed or on her side. The slightest pressure — a bedsheet, a watch band, a bra strap — was intolerable. Our understanding of pain, and especially chronic pain, is far behind where it should be. We don’t know what causes a person with an injury to develop chronic pain, or why it happens in some people and not others, or why it happens more often in women. At a genetic and cellular level, we don’t know which systems get out of whack, or why, or how to fix them.

The psychiatrist and author of “Dopamine Nation” wants us to find balance in a world of temptation and abundance.

Since his inauguration, President Trump has exercised a level of power that has directly challenged the checks and balances that, on paper, define the U.S. government. The Times journalists Michael Barbaro, Maggie Haberman, Jonathan Swan and Charlie Savage discuss Mr. Trump’s plan to institute a more powerful presidency.