Hundreds of billions of marketing dollars are in flux as companies struggle to plan. For some sectors, the timing “couldn’t be worse.”

As the Trump administration pulls government websites and data offline, it is selectively stripping away the public record, letting the president declare his own version...

County clerks and secretaries of state are overwhelmed this year, as they stare down a “perpetual moving target” of new conspiracy theories, political pressure and...

False narratives and conspiracy theories about climate change, immigration and Ukraine are spreading via politicians and foreign operatives.

False narratives and conspiracy theories about climate change, immigration and Ukraine are spreading via politicians and foreign operatives.

Journalists covering the trial face a tricky balancing act: inform the public while keeping its participants out of harm’s way.

Whether it is just for kicks or propelled by genuine doubt, the unsupported claims about celebrities and public figures keep gaining traction online.

A long-running network of accounts, known as Spamouflage, is using A.I.-generated images to amplify negative narratives involving the presidential race.

The tech company’s plan is similar to one announced two days earlier by Meta, another Silicon Valley giant.

The people on 4chan who created the images of Ms. Swift thought of it as a sort of game, the researchers said.