SACRAMENTO, Calif. (AP) — Billionaire climate activist Tom Steyer is selling himself as a class traitor in his bid for California governor. The Democrat with a personal fortune estimated at $2.4 billion wants wealthy people and corporations to pay higher taxes. He’s endorsed by a progressive advocacy group that believes billionaires shouldn’t exist. He founded one of the world’s largest hedge funds yet he’s the candidate taking the heaviest hits from business groups. “I’m the billionaire who