(CNN) - The field of candidates vying to succeed Arnold Schwarzenegger as California governor could grow today.
Los Angeles Mayor Antonio Villaraigosa will announce this afternoon whether he's going to jump into the race. The mayor will make his news on exclusively on CNN's The Situation Room with Wolf Blitzer at 4pm ET.
If Villaraigosa jumps in, he'll join San Francisco Mayor Gavin Newsom, who announced in April that he would run for Democratic nomination for governor in next year's election. California Attorney General and former governor Jerry Brown has indicated he plans to run as well, but he has not officially tossed his hat into the gubernatorial ring. Lt. Gov. John Garamendi may also join the contest.
"Villaraigosa is obviously very well known in Los Angeles and LA has the largest media market in the state," said CNN Senior Political Analyst Bill Schneider. "Ordinarily being a Latino would give Villaraigosa a large base of voters, but he may have to compete with Brown for some of those voters, particularly older ones, who were very loyal to Brown when he was governor back in the 1970's."
On the Republican side, although she hasn't officially announced her candidacy, former eBay executive Meg Whitman appears to be running governor. She would join former Rep. Tom Campbell and California Insurance Commissioner Steve Poizner, who have officially announced their intentions to run for governor of California in 2010.