Markwayne Mullin

9th Secretary of Homeland Security — Homeland Security

Signature issue: Border enforcement continuity — run from a department in a shutdown fight

Scoreboard tally

Wins, pending items, and setbacks on this profile are tallied from published scoreboard entries — never set by hand. The tally begins with the first reviewed weekly entry that scores this official.

Role status — October 2026: Mullin is the incumbent Secretary of Homeland Security — the one 2026 cabinet turnover in his research cluster. President Trump announced the move on Truth Social on March 5, 2026; the Senate confirmed Mullin on March 23, 2026 (54–45); he resigned his Senate seat the same day and was sworn in on March 24, 2026. Trump’s announcement had described the appointment as “effective Mar 31” — the actual March 24 swearing-in superseded that date (Audit Sprint A). His official biography is at dhs.gov/markwayne-mullin, which styles him the 9th Secretary of Homeland Security.

His predecessor’s exit is recorded here with both framings attributed, because the sources conflict: per Trump and the White House, Kristi Noem moved to a new post as Special Envoy for “Shield of the Americas”; other reporting describes her departure as a firing. This chronicle states neither as fact.

Mullin’s stated brief is continuity of the border-enforcement program. His opening weeks, however, were dominated by a departmental shutdown and pay fight — a funding lapse that began in mid-February 2026, before he took office, and left roughly 100,000 DHS employees in pay limbo. He inherited the fight; the record does not attribute its start to him, but managing the department through it is the defining condition of his tenure so far.

Verified channels:

Official-role X: @SecMullinDHS (cited in a White House release)
Personal X: @MarkwayneMullin
Agency X: @DHSgov (DHS Social Media Directory sourcing, Audit Sprint B)
Agency YouTube: youtube.com/ushomelandsecurity (per DHS’s own launch release; the @-handle form is not confirmed)
Official biography: https://www.dhs.gov/markwayne-mullin

Video sources: MODERATE. Roughly seven months in role: department press conferences and border events on the DHS channel, White House footage, and C-SPAN’s record of his appearances. Full-remarks search order for this site: White House → C-SPAN → committee → agency.

Why he matters to this chronicle: Mullin owns Border & Immigration — the administration’s signature promise — at the department that executes it, and his appointment is this roster’s clearest mid-term turnover story: a sitting senator moved into the cabinet while his department was in a funding shutdown. The shutdown fight itself is a recurring scoreboard item for his department, scored on the evidence as it resolves.

Sources (Oct 2026): Research Cluster B (2026-10-18) on the appointment, program, and shutdown context; Audit Sprint A (confirmation and swearing dates settled: Mar 23 / Mar 24, 2026); Audit Sprint Report (dhs.gov biography URL captured directly); Audit Sprint B (@DHSgov directory sourcing; DHS YouTube from DHS’s launch release).