Last mentioned: Mar 24, 2026
First Operational Day
Mullin begins his first full day as Secretary amid departmental budget uncertainty.
Swearing-In Ceremony
President Trump swears in Markwayne Mullin as the new Secretary of Homeland Security.
Funding Impasse
Legislative deadlock over government funding reaches a critical point, raising shutdown fears.
President Trump has officially sworn in Markwayne Mullin as the Secretary of Homeland Security, filling a critical leadership gap at a time of fiscal crisis. The appointment comes as a deepening funding stalemate in Congress threatens a government shutdown, posing significant risks to the nation's cybersecurity operations and CISA's defensive posture.
This page surfaces every story mentioning U.S. Department of Homeland Security across our cybersecurity coverage. We track each entity's appearance over time so readers can trace how the narrative evolves — which developments are isolated incidents, which build into longer arcs, and which reframe how operators in the space think about the entity. Story selection uses the same multi-source verification gate applied across the rest of our coverage.
Read our editorial methodology for how we identify, deduplicate, and score entity references. Our glossary defines the technical terms used across stories on this page, and our trends index contextualizes individual developments against the longer-running cybersecurity beat. Cross-entity comparisons live on our compare view.
| What you see | What it tells you |
|---|---|
| Story count | Number of distinct stories where U.S. Department of Homeland Security was a primary or referenced actor. |
| Recency clustering | Whether mentions are concentrated in a recent window (a news cycle) or distributed (a sustained arc). |
| Sentiment distribution | Aggregate sentiment of the stories mentioning this entity, weighted by impact score. |
| Cross-niche links | When the same entity surfaces in our sibling networks, we link to those views to enrich context. |