Keith Richman is a Republican Assemblyman from the San Fernando Valley that wants to be the GOP nominee for State Treasurer. Prop. 73 is a measure that requires parental notification before an unemancipated minor can get an abortion.
When Assemblywomen Mimi Walters and Sen. Dennis Hollingsworth circulated letters in the GOP caucus asking legislators to support Prop. 73. Only Keith Richman refused to sign. Other self identified "pro-choice" Republicans signed the letter, viewing this measure correctly as a parental rights issue.
The state party endorsed it. Even the liberal California Congress of Republicans endorses the measure.
Why would Richman join Barbara Boxer in opposing this measure? Polls show over 80% of Republican support this issue. How does it help Richman in a closed Republican 
primary to be so adamant in his opposition to parental involvement?
Maybe the only way he can raise the money to compete in the primary is cater to those few wealthy extreme Planned Parenthood supporters that believe that allowing 13 year olds secret abortion and sending them home is better than involving parents. They do have some big money. See their efforts here.
But they don’t have voters. Richman’s blunder will cost him dearly in the June Primary.