The justices sided with a Texas gun owner who faced criminal charges after admitting to marijuana use argued that a federal gun law violated the Second Amendment.

Artificial intelligence is expensive to use, many companies discovered. That has led to a new era of saving costs.

A new book by John Leganski, the floor manager for former Speaker Kevin McCarthy, offers a rare behind-the-scenes account of how President Trump wields his power through threats and intimidation.

The agreement delays the most difficult steps for Iran for later talks, while granting it crucial benefits.

In a Democratic primary for a coveted House seat in Manhattan, Micah Lasher is betting long experience can prevail despite anti-establishment headwinds.

Big tech companies and small start-ups are using social media to hype new tools that allow students to trick teachers and A.I. detectors.

Alexander Sokurov has questioned the Russian president about government repression, but he is still controversial among his country’s exiles.

Midrange attacks, using upgraded drones that Ukraine produces in huge numbers, are causing fuel shortages and complicating troop rotations.

The Obama Presidential Center, opening on June 19, is poised to attract visitors to an often-overlooked area. Here’s what you’ll find in Hyde Park and beyond.