Californias

Google cofounder Sergey Brin and John Doerr have donated a combined $94 million to undercut California's proposed billionaire tax. Peter Thiel has donated $3 million to a separate group.Getty ImagesA handful of California’s estimated 214 billionaires are trying to stop a proposed wealth tax.Google cofounder Sergey Brin, who moved assets…

California has a lot of billionaires, more than any other state and more than most countries. So a proposed wealth tax on its billionaires could be a windfall.Under the Billionaire Tax Act, California residents with a net worth of over $1 billion would face a one-time tax equal to 5%…