Something has gone haywire in the California Democratic Party. It is supposed to be the party that cares about poor families, blue-collar workers and the unemployed – allegedly unlike the Republican Party, which Democrats regularly disparage as being devoted to the wealthy and indifferent to economic suffering. But in Sacramento, the policies pursued by the Democrats who control the Legislature could scarcely be more hostile to what are supposed to be its prime constituencies. Increasingly extreme environmental laws have created a depression in Central Valley farming communities. These laws, high taxes and heavy regulation in general threaten to drive away...