A new Public Policy Institute of California survey finds that a majority of likely voters support Proposition 50, a November ballot measure that would temporarily change how the state draws congressional district maps — and that interest in the outcome is at record levels.

According to the survey released at 8 p.m. Tuesday, 56% of likely voters plan to vote “yes” on Prop. 50, while 43% say “no.” Support is highest among Democrats (84%) and independents (55%), but 89% of Republicans oppose it. Regional divides are sharp: 69% of voters in the San Francisco Bay Area back the measure compared with 44% in the Central Valley.

Nearly 7 in 10 likely voters (68%) said the outcome is “very important” — the highest level of interest PPIC has recorded in more than 20 years.

“We are seeing a record

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