DHS official Julia Varvaro on leave

The Department of Homeland Security has launched an internal investigation into Varvaro's conduct after her former partner, Robert Bianchi, went public with the claims.

Varvaro, who served as the deputy assistant secretary for counterterrorism, reportedly trawled for wealthy partners online while holding a high-level security clearance.

Bianchi, a defense contractor, alleged that Varvaro used the funds for a lavish lifestyle before the relationship ended poorly.

The scandal has raised urgent questions about the vetting of senior administration officials and potential national security risks.