Gavin Newsom Hit as Wife’s Billionaire Cousin Bankrolls Critics Matt Mahan and Steve Hilton

A cousin of Gov. Gavin Newsom’s wife, Jennifer Siebel Newsom, is throwing his tech fortune behind two of the governor’s biggest critics. Siebel Systems founder Tom Siebel, second cousin of Siebel Newsom, gave $50,000 to San Jose Mayor Matt Mahan’s bid for California governor and another $10,000 to Republican former Fox News Host Steve Hilton. Siebel sold Siebel Systems, an enterprise software firm, to Oracle to 2006 for approximately $5.8 billion, making him a billionaire with an estimated net worth of around $4 billion currently.