The recent shootings of lawmakers in Minnesota are part of a disturbing trend toward politically linked violence, ABC News analysts say.

California Sen. Alex Padilla blamed President Donald Trump’s first election campaign and its “tone" for escalating political tensions to the point of violence.

U.S. Capitol Police increased security for Klobuchar and Smith following the attacks, which occurred early Saturday morning. Minnesota's entire congressional delegation, both Republicans and Democrats, released a joint statement condemning the killings.

The suspect wanted in the slaying of a Minnesota lawmaker and her husband, as well as in the injury shooting of a state senator and his wife, was found Sunday night armed and crawling in a field in a sparsely populated stretch of Minnesota,

State Senator John Hoffman and his wife, Yvette, were gunned down at their home early on Saturday morning, but survived. Melissa Hortman - the top Democratic legislator in the state House - and her husband, Mark, were shot and killed. Yvette Hoffman said in a statement that she and her husband John were "devastated" by the Hortmans' deaths.

The names of some congressional officials from the state were listed in the suspected shooter’s papers.

"Hi everyone! I’m looking to get back into the U.S. Food Industry and I'm pretty open to positions," Boelter wrote on LinkedIn last month.

A Minnesota mayor says two state lawmakers were shot in their homes early Saturday. Mayor Ryan Sabas of Champlin said state senator John Hoffman and state representative Melissa Hortman were shot, and that Hoffman's wife was also shot.