If passed, Prop. 36 would reverse Proposition 47, an extensive prison and sentencing reform measure. Since its adoption nearly a decade ago, it has reduced the prison population, reduced recidivism and saved the state more than $800 million.

A California ballot measure to crack down on store theft and drug crimes is heading to the polls with support from big retailers, law enforcement groups, a crypto billionaire — and now, more than 70 mayors.

In California, Proposition 36 would add new penalties for drug and theft offenses and create new sentence enhancements. It seeks to amend Proposition 47, which passed in 2014 to alleviate overcrowding in jails.