The Minnesota man accused of killing a state lawmaker and her husband in a politically motivated assassination pleaded guilty in federal court Thursday.MINNESOTA SHOOTING TIMELINE: SUSPECT VANCE BOELTER’S LAST WORDS TO FAMILY BEFORE CAPTUREVance Boelter entered a guilty plea in Minneapolis for the fatal shootings of Rep. Melissa Hortman and her husband, Mark Hortman.This story is breaking. Please check back for updates.