Proposition 50, the ballot measure that would enact partisan Congressional districts in California, has already become the ninth most expensive initiative in state history.

Ballotpedia revealed Thursday that as of this week, the campaigns for and against Prop. 50 have raised a combined $127.7 million.

Driving the news: Gov. Gavin Newsom and Democrats in the Legislature pushed a partisan redistricting measure, which will go in front of the voters in a special election scheduled for Nov. 4. • The maps seek to help Democrats pick up five seats in Congress, pushing their total up to 48 seats, potentially leaving Republicans with just four representatives from the state.

The big picture: So far supporters of Prop. 50 have raised far more money than the opposition, totaling $87.5 million in

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