Google co-founder Sergey Brin has now spent $100 million to fight California’s proposed billionaire tax—he could owe $13 billion if he loses

Google co-founder Sergey Brin has now spent $100 million to fight California’s proposed billionaire tax—he could owe $13 billion if he loses →

The state’s ultrawealthy, including Larry Page and Peter Thiel, have similarly donated to efforts opposing the wealth tax.