In the United States, political campaigns use data on more than 200 million voting-age Americans to inform their strategies and tactics. The two major U.S. parties compete to use the most accurate data to target voters in various ways, an edge that was ...

A trove of breached data, which has now been taken down, includes user logins for platforms including Apple, Google, and Meta. Among the exposed accounts are ones linked to dozens of governments. In early May, longtime data-breach hunter and security ...