The probe is examining contracting activities at DHS, sources said.

Justice Department prosecutors are investigating the Department of Homeland Security's contracting activities in the first year of the second Trump administration and scrutinizing Corey Lewandowski, a longtime Trump ally who served as ousted DHS Secretary Kristi Noem's top aide, two sources familiar with the matter confirmed to ABC News.

The investigation is in its early stages, sources said, and followed a referral to the department regarding Lewandowski's conduct from DHS Inspector General Joseph Cuffari.

Corey Lewandowski, American political operative and former campaign manager for Donald Trump, is seen during the CPAC Poland 2025 conference.

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"Mr.…