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

New York Post ^ | April 17, 2026 | Annie Gaus

[nickcarraway]

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.

---

TOPICS: Crime/Corruption; Culture/Society; News/Current Events; Politics/Elections; US: California
KEYWORDS: democratcorruption; gavinnewsom; highspeedrail; stevehilton; tomsiebel

[nickcarraway]

Matt Mahan is the mayor of San Jose. He's a Democrat, but he's more the "less crazy" Democrat. He won running against Cindy Chavez, an all out progressive.

[ridesthemiles]

THIS IS GETTING VERY INTERESTING CAT FIGHT!!!!

[Seaplaner]

True, however San Jose is a true garbage heap.

[marktwain]

For a multi-billionaire, $60,000 is equivalent to $60 for a multi-millionaire.

Good news, but not much of a commitment.

[Ronaldus Magnus III]

A long time ago, in a California far from Kalifornia, I bicycled through orange groves in San José.

[MayflowerMadam]

On Newsmax the other day someone said that Newscum’s wife’s parents are MAGA.

[ConservativeMind]

Siebel is a reasonable guy.

[CondoleezzaProtege]

Matt Mahan is the mayor of San Jose. He's a Democrat, but he's more the "less crazy" Democrat. He won running against Cindy Chavez, an all out progressive.

^ This.

[CondoleezzaProtege]

Rick Caruso, who ran against Karen Bass, endorsed Matt Mahan. That’s how I learned about him.

I wish Caruso would run again for mayor!