Vice President JD Vance on Monday jumped onto the conservative movement demanding consequences for those who have cheered Charlie Kirk’s killing, calling on the public to turn in anyone who says distasteful things about the assassination of his friend and political ally.

“When you see someone celebrating Charlie’s murder, call them out,” Vance urged listeners on the slain activist’s podcast Monday. “And hell, call their employer.”

Vance’s call also included a vow to target some of the biggest funders of liberal causes as conservatives stepped up their targeting of private individuals for their comments about the killing. It marked an escalation in a campaign that some warned invoked some of the darkest chapters of American history.

“The government involvement in this does inch this closer to looking like McCarthyism,” said Adam Goldstein of the Foundation for Individual Rights and Expression, referring to the 1950s campaign to root out communists that led to false allegations and ruined careers. “It was not a shining moment for free expression.”