Ellen O’Kane Tauscher (November 15, 1951 – April 29, 2019) was an American politician and member of the Democratic Party who was the U.S. Representative for California’s 10th congressional district from 1997 until her resignation in 2009 upon joining the State Department, where she served as the Under Secretary of State for Arms Control and International Security Affairs until February 2012. She then served as Special Envoy for Strategic Stability and Missile Defense at the State Department until August 31, 2012.
She served on the University of California Board of Regents and, in February 2018, became chairman of the Board of Governors for Los Alamos National Security and Lawrence Livermore National Security, a consortium led by the University of California Board of Regents. She also served as Vice Chair of the Student and Academic Affairs Committee of the Board of Regents.
While in Congress, Tauscher was a leading centrist Democrat, and the chairman of the New Democrat Coalition, a caucus of 65 moderate Democrats in the House of Representatives. She also served as vice-chairwoman of the Democratic Leadership Council from 2001 to 2005.
After leaving the State Department, Tauscher assumed a number of publicly held corporate and non-profit board positions, including serving on the boards of Edison International/Southern California Edison (EIX) in Rosemead, California, and eHealth (EHTH) in Mountain View, California. She served on the Board of Advisors of SpaceX, the Board of Directors of BAE Systems, INC., NTI, and the Executive Committee of the Atlantic Council. She served as vice chair of the Atlantic Council’s Brent Scowcroft Center on International Security and was a member of the Board of Regents of the University of California system.