Donors pour more than $200 million into supporting and opposing the billionaire tax measures on the ballot, with more to come in the weeks before the Nov. 3 election.

In divisive races such as the Democratic primaries for U.S. Senate in Michigan and Minnesota, California donors have given large amounts to both progressive and moderate candidates.

Companies and special interest groups with some of the diciest issues expected to land on California's next governor's desk are among the top financial backers of Democrat Xavier Becerra, the gubernatorial front-runner.