Wealthy farmer Dino Cortopassi has a lot in common with Gov. Jerry Brown. Both are in their late 70s. Both are opinionated. Both are Democrats. And both have a lot riding on Proposition 53, which would force state leaders to get voters’ approval before undertaking massive state building projects needing $2 billion or more in revenue bonds. Cortopassi, a 79-year-old Central Valley farmer and food processor, is pouring his money into passing the ballot measure, which could upend two legacy projects for Brown: $15.7 billion to build giant water tunnels to carry Northern California water southward, and $64 billion for a high-speed rail system.