Though supporters have already claimed victory, Proposition 11 is still considered too close to call a definite winner, according to the California Secretary of State's Web site.

The "Yes" vote on the redistricting reform measure had 5,084,628 votes as of Tuesday afternoon, compared to 4,948,935 votes against.

By percentages, that translated into 50.7 percent in favor and 49.3 percent against.

That's only a slight change from last Wednesday, when the measure was passing with 50.6 in favor and 49.2 against. Proposition 11 supporters claimed the measure had passed that day, though there were more than 2 million outstanding ballots statewide as of late Monday.

A group opposing the measure, Citizens for Accountability, did not immediately return a request for comment on the newest ballot returns.

One report found that thousands of voters filled out ballots but left Proposition 11 entirely blank, possible because redistricting is an arcane topic to most voters.

The measure, if ultimately successful, won't take effect until after the U.S. Census of 2010.

A 14-member redistricting commission of citizens inactive in state politics would use census data and other criteria to draw new political districts for the state Assembly, Senate and Board of Equalization.

ELSEWHERE on PolitickerCA.com:

• Backers for Proposition 11 hail victory
• Prop. 11 supporters, opponents taking wait-and-see posture
• Both sides of Prop. 11 hopeful on results