Corey Lewandowski speaks to the press in July 2024..(Photo by Andrew Harnik/Getty Images) - Andrew Harnik/Getty Images

Justice Department prosecutors are investigating allegations of contract misconduct at the Department of Homeland Security, including the role of Corey Lewandowski who worked as de facto chief of staff to former Secretary Kristi Noem, according to multiple people familiar with the investigation.

The probe follows a criminal referral for Lewandowski from the DHS Inspector General’s office, whic...