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 wants to tax other billionaires,” he’s fond of saying, though he’s given only tenuous backing to a billionaires’ tax proposal likely to appear before California voters in November. Steyer has long leaned into the contradictions between his business success and political views. While his hedge fund invested in fossil fuels, Steyer spent millions to protect a California law aimed at curbing planet-warming emissions.…