State prosecutors had previously charged the man with second-degree murder in the deaths of State Representative Melissa Hortman and her husband.

© Tim Gruber for The New York Times

Vance Boelter, the man accused of shooting two state lawmakers in June, killing one, entered the plea at a brief hearing in federal court in Minneapolis.

© Tim Gruber for The New York Times

Gov. Tim Walz of Minnesota activated the National Guard to help the city of St. Paul address a cyberattack that was detected last Friday.

© Erica Dischino for The New York Times