On politics in the Golden State
October 11, 2012 | 11:13 am

Gov. Jerry Brown’s tax plan is polling below 50% for the first time, according to a new online survey released from the California Business Roundtable.

Two weeks ago, the same poll showed support for Proposition 30 at 57.5% That has dropped to 49.5% in the latest survey, with 41.7% of those polled saying they were opposed to the measure.

The online poll of 830 likely voters was conducted Sunday through Wednesday. Radio and television ads began running against the governor’s measure during that time, and are likely the reason for the drop in support, says Rob Lapsley, president of the Roundtable.

The survey was taken just as proponents of a rival tax measure, Proposition 38, began airing ads that criticized Brown’s measure.

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