California had an open primary not long ago, and it was overturned by the U.S. Supreme Court. What makes anyone think that this would fare any different if approved?
Prop 60 was written to keep things as they are, and you should vote YES for it.
We can avoid open primaries by either defeating Prop 62, or by passing Prop 60 with a higher vote than Prop 62.
NO on 62 and Yes on 60