In what is likely a first for California, a candidate for Governor, Steve Poizner, told the Sacramento Bee that if elected he would work to slash personal income taxes, corporate taxes, and sales taxes by 10%. That would mean reducing the top California personal income tax bracket from 9.55% to 8.60% and the corporate tax rate from 8.80% to 7.92%. The sales tax rate would also drop, likely (in Orange County) from 8.75% to 8.00%.
Poizner is running in the Republican primary next year; he faces (among others) Meg Whitman.
The reality is that while such a plan would be a boon for California in the long-run (increasing tax rates decreases tax collections), it has no chance of passing the legislature.