US Transportation Secretary Sean Duffy has previewed a major announcement due on Monday, describing it on social media as an "unprecedented fraud crackdown" involving multiple federal agencies. In his post, he tagged Homeland Security Secretary Markwayne Mullin along with the Department of Homeland Security, Immigration and Customs Enforcement, the Department of Justice and the White House Task Force to Eliminate Fraud, pointing to a coordinated, cross-departmental effort. No specifics were given on the announcement's timing, location, the type of fraud involved, or whether any arrests have taken place.

The teaser fits into the Trump administration's wider anti-fraud drive. The White House Task Force to Eliminate Fraud was set up in March to coordinate action on federal benefit programmes, while the Department of Justice has since created a National Fraud Enforcement Division to pursue misuse of taxpayer money. Duffy's own department has been working with DHS on trucking industry fraud, including a July investigation into roughly 75 commercial driving schools accused of falsifying records, alongside roadside checks targeting unqualified foreign lorry drivers.