A group backed by wealthy individuals, including Google co-founder Sergey Brin, has made a significant financial contribution. They gave $5 million to a group that opposes Proposition 40.

This donation is part of the ongoing debate over a proposed tax in California. The tax is often referred to as the billionaire tax.

Further details about the proposed tax and the opposition to it can be found in the Los Angeles Times. The $5 million donation is a notable development in this discussion, but more information is available from the source for those looking to learn more.