Domestic Surveillance Is Expanding With New, AI-Powered Tools

The Department of Homeland Security is spending hundreds of millions of dollars on tools that give federal agents easy access to personal data and whereabouts of millions of people. WSJ investigative reporter Hannah Critchfield explains the latest on the technology, and how it’s being deployed. Plus, WSJ Supreme Court reporter James Romoser joins to break down the battle over whether geofence warrants are an unconstitutional invasion of privacy. Sign up for the WSJ's free Technology newsletter.