CNN will host a televised California gubernatorial debate on May 5 featuring eight candidates who met polling and fundraising criteria.Republicans Steve Hilton and Chad Bianco join six Democrats including Xavier Becerra and Katie Porter for the event in Los Angeles.The state's unique top-two primary system allows the highest vote-getters to advance regardless of party which could favor conservatives.Donald Trump recently endorsed Hilton as the eligibility window for the high-stakes June 2 primary contest closes on April 27.