A sharp reversal in Asian stocks, after a rally fueled by Nvidia’s strong earnings, underscores how fears of an A.I. bubble are driving broad market swings.

Trump’s show of force toward Venezuela has created a disastrous political trap — for Venezuelans most of all.

Representative Eric Swalwell, a Democrat, is likely to emphasize his history of fighting President Trump, an approach that many Democratic voters say they want their elected officials to take.