Federal prosecutors are investigating mortgage fraud allegations involving Senator Adam Schiff, overseen by Trump administration appointees Ed Martin and Bill Pulte.Christine Bish, a Republican congressional candidate and real estate agent, was interviewed about her role in promoting these allegations and her communications with Martin and Pulte.The probe also examines claims that individuals claiming to work for Pulte or Martin were impersonating federal officials, and subpoenas have targeted other officials such as Federal Reserve Governor Lisa Cook.