The handling of the federal investigation into Democratic Sen. Adam Schiff of California is being reviewed by Justice Department investigators, three sources familiar with the matter told CBS News.

A Republican congressional candidate who lives in California, Christine Bish, submitted a tip to the Federal Housing Finance Agency, alleging fraud in Schiff's mortgage documentation. She told CBS News that she was questioned by federal officials Thursday and was asked about Bill Pulte. He's the head of the Federal Housing Finance Agency and was appointed to the position by President Trump. Pulte referred Schiff to the Justice Department in May for investigation over alleged mortgage fraud.

Schiff has denied any wrongdoing, and on Thursday declined to comment when asked about Pulte.

Bish said

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