Charlie Kirk, the 31-year-old founder of Phoenix-based Turning Point USA and a close ally of President Donald Trump, was shot and killed Sept. 10. Educators across the country who posted opinions on Kirk's death found themselves in trouble last week. "It has a McCarthyism feel to it," said Andrew Spar, president of the Florida Education Association, the state teachers union. School districts, parents and others are being urged to search teacher social media posts for negative comments over conservative activist Charlie Kirk's death. Those teachers, in turn, are being threatened not only with suspension and termination, but also revocation of...