Donors have contributed more than $207 million so far in the fight over whether to redraw California’s congressional lines with supporters of the ballot measure pacing nearly 70% ahead of opponents.

The fundraising so far marks one of most expensive ballot measure efforts in California's history.

Proposition 50, the statewide proposition slated for a Nov. 4 special election , would allow new congressional maps that would benefit Democrats to stand through 2030. (You can check here to see if where you live is affected.) If approved, the ballot measure would temporarily upend California’s nonpartisan approach to drawing congressional lines that’s been in place since 2008.

The ballot measure was approved by the California Legislature back in August , escalating tensions between C

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