The Democratic senator from Minnesota and others implored the Utah Republican to take down his "cruel" social media posts and apologize to the victims' families.

Republican Sen. Mike Lee is facing criticism over his social media posts about the assassination of a Minnesota lawmaker and her husband-- with one Democratic senator calling the posts "reprehensible.

After a longtime Minnesota state lawmaker and her husband were assassinated over the weekend — and another legislator and his wife were hospitalized after being attacked by the same shooter — Sen. Mike Lee (R-Utah) joked about it on social media.