“If you receive a message claiming to be from a senior US official, do not assume it is authentic,” the FBI warned in May. The public service announcement was written as advice for everyone but noted that many of the targets of “malicious actors” impersonating U.S. officials are other “current or former senior US federal or state government officials and their contacts.” While every corporate worker today is probably familiar with HR-mandated trainings to try to combat “phishing”—scams that