Who is Tom Steyer? Billionaire climate crusader announces run for California governor

Billionaire activist Tom Steyer has launched his bid for California governor, aiming to address the state's affordability crisis. Having previously run for president, Steyer, a significant Democratic donor, pledges to lower utility bills, build homes, and make education free. He enters a crowded Democratic field facing Republican challenges, with former frontrunner Katie Porter recently facing scrutiny.