Two regulatory rollbacks, along with a new A.I. experiment in Medicare, raise some worrisome questions.

Trump, sinking into the quicksand of imperialism.

An intense cat-and-mouse game is putting enraged locals face-to-face with heavily armed agents.

Stores of all kinds are using artificial intelligence to sell everything from luxury handbags to hay for horses.

Physicians with independent practices are having to cobble together unconventional office arrangements at a time of rising costs and consolidation in the medical field.

Black female professionals have seen a steep drop in employment over the last year. They are turning to each other for pep talks and résumé advice.

Even as some instructors remain fervently opposed to chatbots, other writing and English professors are trying to improve them.

A video from Ken Paxton, a Republican primary challenger to Senator John Cornyn of Texas, depicted A.I.-generated imagery of the senator twirling with Jasmine Crockett, a Democratic Senate candidate.