LAS VEGAS—President Trump’s national cyber director showed up at Black Hat with a supportive message for private industry: Your threat model doesn’t include us regulating you. "We want to make sure that we are working hand in glove and collaboratively with industry,” Sean Cairncross said at the start of an onstage interview here on Tuesday afternoon. (Emphasis on “perceived”; the Biden administration’s approach to cybersecurity mainly involved detailed advice and encouragement to companies, backed up with new requirements for federal contracts.) A Few Careful OmissionsBut the sales pitch Cairncross gave for Trump’s approach to cybersecurity also left out many points that should be on attendees' minds. Cairncross also did not discuss the turmoil Trump has inflicted on the Cybersecurity & Infrastructure Security Agency (CISA) since last January.