Antonio Villaraigosa, former Los Angeles mayor focused on big-city governance. Matt Mahan, San Jose mayor and ex-tech founder pushing pro-housing local reforms. Katie Porter, policy-focused former congresswoman on tenant protections. Xavier Becerra, ex-attorney general and HHS secretary with litigation experience. Tom Steyer, philanthropist and climate activist funding housing initiatives. They debate construction costs, permitting delays, modular housing, enforcement vs local control, and interim solutions.