A man pleaded guilty to federal charges in the assassination of a Minnesota lawmaker and her husband. Prosecutors opted not to seek the death penalty.

The man charged in the political assassinations of the top Democrat in the Minnesota House and her husband, as well as the non-fatal shootings of a state senator and his wife, pleaded guilty in federal court on Thursday after prosecutors said they would not seek the death penalty. Vance Boelter was charged with murdering Minnesota House Speaker Melissa Hortman and her husband, Mark Hortman, and with shooting state Senator John Hoffman and his wife, Yvette Hoffman. Boelter came to their doors in....