It is no exaggeration to say that his crimes are the stuff of nightmare,” acting U.S. Attorney Joseph Thompson said.

Mike Lee (R-Utah) is facing scrutiny over new social media posts tied to the Minnesota suspect in the deadly shootings targeting Democratic lawmakers over the weekend. While the man suspected of killing a lawmaker and wounding another remained on the run,

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.

Minn., joins Morning Joe to discuss the killings of Minnesota lawmaker Melissa Hortman and her husband Mark. Sen. Klobuchar also discusses the social media posting about the shooting from Sen. Mike Lee,