Google co-founder Sergey Brin has donated $102 million to oppose California's billionaire wealth tax, making him the largest individual contributor. 
Google co-founder Sergey Brin has donated $102 million to oppose California's billionaire wealth tax, making him the largest individual contributor. 
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Google co-founder Sergey Brin has donated $102 million to oppose California's billionaire wealth tax, making him the largest individual contributor.&nbsp;
