 Since Supreme Court justices are appointed for life, this could not have been a political threat that they wouldn't be reelected or something. It could only have been what it was, a literal threat of violence, which the justices have endured. Justice Kavanaugh was nearly assassinated by a leftist in 2022 after other leftists leaked the Dobbs decision overturning Roe v. Wade. Justice Sam Alito was forced to move out of his house for a time. Threats from the left became so intense.