Homeland Security Secretary Markwayne Mullin to brief on election cybersecurity findings after President Trump’s address

President Donald Trump said Thursday that Homeland Security Secretary Markwayne Mullin will hold a briefing to discuss the department’s cybersecurity findings involving electronic voting systems. The announcement was followed by a news conference scheduled to begin live as Mullin addressed the topic, according to PBS NewsHour Politics.

PBS NewsHour Politics reported that Mullin’s briefing comes after Trump’s address to the nation earlier Thursday, in which the president referenced election security and directed further government discussion on cybersecurity issues tied to electronic vote casting and tabulation.

The planned event places the U.S. Department of Homeland Security at the center of the administration’s public explanation of what it says its cybersecurity work has identified regarding election technology. The briefing is framed as an opportunity for DHS leadership to provide detail and context directly to reporters and the public.

A core feature of the event is its focus on electronic voting systems, a category that includes technologies used to record, transmit, or count ballots. How those systems are governed can vary by state, and DHS involvement typically centers on federal cybersecurity support and coordination rather than direct state election administration, according to the general structure of U.S. election roles.

In the lead-up to the briefing, PBS described the schedule as linked to Trump’s Thursday remarks and as an extension of the administration’s messaging on election security. The live format indicates the department intends to deliver its assessment publicly rather than only through private channels.

No additional details about the substance of DHS’s “cybersecurity findings” were included in the PBS description beyond the purpose of the briefing and the connection to Trump’s address, leaving the specific claims, methods, and conclusions to be presented during the news conference.

The briefing’s immediate practical effect is to put DHS messaging on record for journalists and officials watching election administration developments. It may also shape what questions election security officials, state election administrators, and voting technology stakeholders ask next as they assess the implications of DHS’s cybersecurity work for election systems and procedures.