Governor Gavin Newsom is under investigation by the U.S. Department of Justice alongside his wife, Jennifer Siebel Newsom. The probe focuses on Siebel Newsom's tax matters and the activities of various nonprofits connected to the couple. These include The Representation Project, from which Siebel Newsom received over $161,250 last year, and California Partners Project, which raised over $4.8 million in donations since 2020. The investigation also touches on the California State Protocol Foundation, which received more than $5 million in gifts and grants from 2020 to 2024. Newsom has characterized the investigation as a "political witch hunt" orchestrated by Donald Trump, who he alleges is targeting him due to a potential 2028 presidential bid.

Newsom has proactively used the investigation as a fundraising opportunity, sending out an email soliciting donations to help "fight off this political witch hunt." This strategy is seen by some political strategists as beneficial, potentially creating a "fundraising and media bonanza" for Newsom by portraying him as a target of political abuse. He made the announcement via a 4.5-minute video, getting ahead of federal authorities to frame the narrative as a "personal vendetta.

The investigations, which have been ongoing for approximately a year, reportedly originated from whistleblower complaints to the U.S. Attorney's Office in Sacramento, not from Washington D.C.'s political leadership. Federal agents have contacted numerous employees, associates, and donors tied to the Newsoms, seeking financial records and inquiring about specific transactions. The investigations also include a separate probe related to Newsom's former chief of staff, Dana Williamson, who recently pleaded guilty to fraud and lying to the FBI, though Newsom's office claims Williamson's conduct was "entirely unrelated" to the governor.

Ethics watchdogs like California Common Cause have raised concerns about "behested payments," a legal but controversial practice in California politics that allows officials to solicit unlimited donations for charitable causes, subject to disclosure for amounts over $5,000. For instance, the California Partners Project reportedly received about $5.1 million through such payments since 2020. Critics argue this system can be used to curry favor, labeling it "corruption in plain sight."