Mahan has positioned himself outside of the state’s political establishment, which could allow him to run as a “change” candidate in a crowded field of Democratic hopefuls. He has clashed repeatedly with local Democrats and organized labor. A former tech executive, Mahan enters the race with less statewide recognition than Rep. Eric Swalwell and former Rep. Katie Porter. Another hurdle to Mahan’s candidacy could be the desire among Democratic voters in deep blue California for leaders who mount a fight against President Donald Trump. By contrast, Mahan has rarely criticized Trump, preferring to focus on local issues such as homelessness and public safety.