The killing of a Minnesota lawmaker and her husband sent shockwaves through the political world and appeals from elected officials to turn down heated rhetoric.

The assassination of a Democratic Minnesota state lawmaker and her husband and the shooting of another lawmaker and his wife at their homes are just the latest addition to a long and unsettling roll call of political violence in the United States.

Minnesota law enforcement officials said June 14 a list of individuals, potentially targets, was found in one of Boelter's vehicles, NPR reported. At a press conference, officials said the names on the list were largely in midwestern states, including Michigan.

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Suspected assassin Vance Boelter is seen during his arrest in Sibley County following a two-day manhunt in Minnesota. Ramsey County Sheriff Bob Fletcher said someone matching Boelter's was seen on a resident's trail camera. Boelter attempted to evade arrest for about an hour,… pic.twitter.com/AMnUbM85Nh

The United States has a long and grim history of political violence, from presidential assassinations to lynchings and violence aimed at Black people in

Authorities searched a vehicle on a rural road outside Minneapolis that they believe had been used by the man wanted in the shootings of two Democratic lawmakers.

Republicans and Democrats said Saturday's killings in Minnesota were a chilling reminder of the threats they receive regularly.