The debilitating hack of Treasury, Homeland Security and other federal agencies through a software supplier underscores the need for the Biden administration’s new cybersecurity leaders to rely on the private sector’s threat information and cooperation. However, the incoming Democratic team may have trouble persuading companies that it prioritizes combatting cyber attacks and snaring criminals over policing corporations’ cybersecurity shortcomings. This article offers insight from interviews with cybersecurity leaders at Dechert, Perkins Coie and Ropes & Gray, as well as speakers on recent panel discussions, about key points of tension in public-private relationships, including the fight against ransomware and disputes over data breach reporting. We also analyze how priorities and approaches may change with a new administration and what issues to track. See “Senior Commerce Official Discusses Supply Chain Security and Cyber Policy” (Oct. 21, 2020).