Billionaire Tom Steyer’s ad spending is shattering records in the California race for governor

Win or lose, billionaire Democrat Tom Steyer will leave a mark in the history books in his bid to become California’s next governor — he’s running the most expensive political advertising campaign in the country this year.Steyer — a former hedge fund manager turned liberal activist — has spent or booked more than $195 million in ads for broadcast TV, cable and radio with the tally still growing, according to data compiled by advertising tracker AdImpact.His torrent of ads have opened...