UPDATE: Villaraigosa just told Wolf Blitzer that he won't run, calling it an "agonizing decision."

ORIGINAL POST: CNN reports that Los Angeles Mayor Antonio Villaraigosa will make an announcement about his political future today on "The Situation Room."

San Francisco Mayor Gavin Newsom and former Governor and current Attorney General Jerry Brown are already running in the Democratic primary for California governor. There has been speculation for years -- going back even to the 2006 gubernatorial race -- that Villaraigosa would likely run this year, though it has cooled somewhat of late.

The Los Angeles Times this weekend ran results of a poll showing that Villaraigosa's standing in the state's largest city is fairly strong. He begins a second term on July 1.

Villaraigosa Job Performance
Approve 55
Disapprove 37

Should He Run For Governor?
Yes 42
No 48

It would seem that that an announcement on national cable, rather than on local television, signals he may pass on the race. Then again, Gov. Arnold Schwarzenegger (R) announced his candidacy in the 2003 recall on "The Tonight Show."

After the jump, see results of a three-way race among Democrat candidates in the city.

Gubernatorial Primary Election Matchup (Los Angeles Voters)
Villaraigosa 38
Brown 31
Newsom 13
Undecided 14

The poll was conducted by Greenberg Quinlan Rosner Research (D) in conjunction with Public Opinion Strategies (R) from June 10-16, and had a margin of error of +/- 2.6 percent. 1,500 Los Angeles voters were surveyed.