A.I. Growth Has Been Eye-Popping, but Some Worry About a House of Cards

It is a time of superlatives in the tech industry, with historic profits, stock prices and deal prices. It’s enough to make some people very nervous.

Asian and European Stocks Fall Over Fears of an A.I. Bubble

A sharp decline, after a rally fueled by Nvidia’s strong earnings, underscored how investor anxiety over A.I. is driving broad market swings.

Congressional Republicans Begin to Look Beyond Trump

Election defeats earlier this month and the approach of 2026 have G.O.P. lawmakers cautiously asserting themselves.

European Leaders Back Zelensky After U.S. Plan Leaves Them Out

It would require Kyiv to surrender territory, reduce its army’s size and relinquish some weaponry, according to officials familiar with the proposal.

Trump and Mamdani Will Meet for First Time, With Implications for New York

Zohran Mamdani, the mayor-elect of New York City, will visit President Trump at the White House today. The stakes are high for the city.