Tom Steyer may be one of the most influential Californians you’ve never heard of. But that may change. Speculation about a potential run for Governor, the U.S. Senate or even the Presidency has thrust his name into the headlines. But the Democrat and environmental activist is not a stranger to politics. He’s been the driving force behind a number of California ballot measures, including most recently the one that raised the state’s tobacco tax. He’s also founded the group NextGen Climate, which is a non-profit focused on climate change, which has since rebranded itself NextGen America . He joined us on Valley Edition to talk about his group’s involvement in support clean water legislation for local communities, and about his thoughts on President Trump, universal health care, and his rumored political ambitions.