Tom Steyer, the controversial billionaire who ran unsuccessfully for president, is trying to appeal to California voters with a “single-payer” health care policy. He is not alone. Former Congresswoman Katie Porter and former Health and Human Services Secretary Xavier Becerra also proclaim their support for single-payer . Together, these three are California’s highest-polling Democrats running for governor. And with support for “single-payer,” they are united behind what would be one of the