SACRAMENTO, Calif. (AP) — The campaigns for and against the 11 initiatives on California’s November ballot have raised an astonishing $350 million so far on causes ranging from Gov. Jerry Brown’s tax increase to a labeling requirement for genetically modified food.

Californians can thank a handful of billionaires and millionaires for jamming the airwaves and mailboxes with a barrage of advertising, as individuals are the biggest mega-donors this campaign season. In many cases, the opposition campaigns are spending even more than supporters as they seek to kill initiatives that threaten their political power.