Vance Boelter pleaded guilty on Thursday to the murders of former Democratic House Speaker Melissa Hortman, one of Minnesota's most consequential legislative leaders, and her husband, Mark, as well as the shooting of state Sen. John Hoffman and his wife. The shocking acts of violence nearly a year ago to the day scarred the state and injected a new level of fear into politics. Boelter, 58, shuffled into the federal courtroom in downtown Minneapolis, wearing orange prison garb, white velcro sneakers and shackles around his ankles. He was unemotional as he told the judge he was of a clear mind...