SACRAMENTO, Calif. (Legal Newsline)-California Attorney General Jerry Brown leads the Democratic race for governor, a poll indicates.

Brown, a former state governor, leads the poll with 24 percent support. Trailing is San Francisco Mayor Gavin Newsom, who had 16 percent support, and Los Angeles Mayor Antonio Villaraigosa, with 15 percent, the Probolsky Research/Capitol Weekly Poll shows.

Twenty-eight percent of Democrats surveyed said they were not sure who they planned to vote for in 2010 to succeeded Republican Gov. Arnold Schwarzenegger, who is barred by term limits from seeking reelection.

On the Republican side, former U.S. Rep. Tom Campbell leads with 13 percent support, while former eBay CEO Meg Whitman has 10 percent support and state Insurance Commissioner Steve Poizner at 8 percent.

Sixty-four percent of Republicans surveyed said they were not sure who they would support for their party's nomination.

"Republican voters exhibited a great deal of uncertainty, even when pressed their inclinations. That said, former Congressman Tom Campbell and former EBay CEO Meg Whitman lead the Republican line-up. Former Gov. Jerry Brown leads the Democratic line-up by a wide margin," Probolsky Research said in its analysis.

Brown, 71, was California governor from 1975 to 1983. He was the mayor of Oakland, Calif., from 1998 to 2006, before being elected as the state's chief legal officer in 2007. Brown unsuccessfully sought the Democratic nominations for U.S. president in 1976, 1980, and 1992.

The Probolsky Research/Capitol Weekly Poll, taken May 25 to May 29, surveyed 751 registered voters. The poll's margin of error is plus or minus 3.7 percent.

From Legal Newsline: Reach staff reporter Chris Rizo at chrisrizo@legalnewsline.com.