This is a list of Republicans and conservatives who opposed the re-election of incumbent Donald Trump, the 2020 Republican Party nominee for President of the United States. Among them are former Republicans who left the party in 2016 or later due to their opposition to Trump, those who held office as a Republican, Republicans who endorsed a different candidate, and Republican presidential primary election candidates that announced opposition to Trump as the presumptive nominee. Over 70 former senior Republican national security officials and 61 additional senior officials have also signed onto a statement declaring, "We are profoundly concerned about our nation's security and standing in the world under the leadership of Donald Trump. The President has demonstrated that he is dangerously unfit to serve another term."
A group of former senior U.S. government officials and conservatives—including from the Reagan, Bush 41, Bush 43, and Trump administrations formed The Republican Political Alliance for Integrity and Reform (REPAIR) to, "focus on a return to principles-based governing in the post-Trump era." A third group of Republicans, Republican Voters Against Trump was launched in May 2020 collected over 500 testimonials opposing Trump.
Former Executive Branch officials U.S. President
George W. Bush, 43rd President of the United States (2001–2009), Governor of Texas (1995–2000) (wrote-in Condoleezza Rice)
Cabinet-level officials Peter Allgeier, U.S. Trade Representative (2005, 2009) (endorsed Joe Biden) William Cohen, U.S. Secretary of Defense (1997–2001), Chair of the Senate Aging Committee (1995–1997), Chair of the Senate Indian Affairs Committee (1981–1983), U.S. Senator from Maine (1979–1997), U.S. Representative from ME-02 (1973–1979) (endorsed Joe Biden) Stuart M. Gerson, U.S. Attorney General (1993), Assistant Attorney General for the Civil Division (1989–1993) (endorsed Joe Biden) Carlos Gutierrez, U.S. Secretary of Commerce (2005–2009) (endorsed Joe Biden) Chuck Hagel, U.S. Secretary of Defense (2013–2015), Chair of the President's Intelligence Advisory Board (2009–2013), U.S. Senator from Nebraska (1997–2009) (endorsed Joe Biden) Michael Hayden Director of the National Security Agency (NSA) (1999–2005), Principal Deputy Director of National Intelligence (2005–2006), Director of the Central Intelligence Agency (2006–2009), 4 star general (April 22, 2005) (endorsed Joe Biden) Carla Hills, U.S. Trade Representative (1989–1993), U.S. Secretary of Housing and Urban Development (1975–1977) (endorsed Joe Biden) Peter Keisler, U.S. Attorney General (2007), Assistant Attorney General for the Civil Division (2003–2007), Acting Associate Attorney General (2002–2003) (endorsed Joe Biden) Ray LaHood, U.S. Secretary of Transportation (2009–2013), U.S. Representative from IL-18 (1995–2009) (endorsed Joe Biden) James Mattis, Secretary of Defense (2017–2019) Bob McDonald, U.S. Secretary of Veterans Affairs (2014–2017) (endorsed Joe Biden) John Negroponte, U.S. Deputy Secretary of State (2007–2009), Director of National Intelligence (2005–2007), U.S. Ambassador to Iraq (2004–2005), U.S. Ambassador to the United Nations (2001–2004), U.S. Ambassador to the Philippines (1993–1996), U.S. Ambassador to Mexico (1989–1993), Deputy National Security Advisor (1987–1989), Assistant Secretary of State for Oceans and International Environmental and Scientific Affairs (1985–1987), U.S. Ambassador to Honduras (1981–1985) (endorsed Joe Biden) Mary Peters, U.S. Secretary of Transportation (2006–2009) (endorsed Joe Biden)
Colin Powell, U.S. Secretary of State (2001–2005), Chairman of the Joint Chiefs of Staff (1989–1993), National Security Advisor (1987–1989) (later Independent, endorsed Joe Biden) William Reilly, Administrator of the Environmental Protection Agency (1989–1993) (endorsed Joe Biden) Tom Ridge, U.S. Secretary of Homeland Security (2003–2005), Governor of Pennsylvania (1995–2001), U.S. Representative from PA-21 (1983–1995) (endorsed Joe Biden) Thomas A. Shannon Jr., U.S. Secretary of State (2017) (endorsed Joe Biden) Ann Veneman, executive director of UNICEF (2005–2010), U.S. Secretary of Agriculture (2001–2005) (endorsed Joe Biden) William H. Webster, Chair of the Homeland Security Advisory Council (2005–2020), Director of Central Intelligence (1987–1991), Director of the Federal Bureau of Investigation (1978–1987), Judge of the U.S. Court of Appeals for the Eighth Circuit (1973–1978), Judge of the U.S. District Court for the Eastern District of Missouri (1970–1973), U.S. Attorney for the Eastern District of Missouri (1960–1961) (endorsed Joe Biden) Christine Todd Whitman, Administrator of the Environmental Protection Agency (2001–2003), Governor of New Jersey (1994–2001) (endorsed Joe Biden) Robert Zoellick, U.S. Trade Representative (2001–2005) (endorsed Joe Biden)
Defense Department officials Chuck Boyd, 4-star General United States Air Force (1959–1995) (endorsed Joe Biden) Torie Clark, Assistant Secretary of Defense for Public Affairs (2001–2003) (endorsed Joe Biden) Michael Donley, U.S. Secretary of the Air Force (2008–2013) (endorsed Joe Biden) Raymond DuBois, Acting Under Secretary of the Army (2005–2006) (endorsed Joe Biden) William McRaven, Admiral, Commander of U.S. Special Operations Command (2011–2014) (endorsed Joe Biden) Sean O'Keefe, Administrator of the National Aeronautics and Space Administration (2001–2004), U.S. Secretary of the Navy (1992–1993) (endorsed Joe Biden) Richard V. Spencer, U.S. Secretary of the Navy (2017–2019) (endorsed Michael Bloomberg) William Howard Taft IV, U.S. Ambassador to NATO (1989–1992), U.S. Deputy Secretary of Defense (1984–1989) (endorsed Joe Biden) Michael Vickers, Under Secretary of Defense for Intelligence (2011–2015) (endorsed Joe Biden) Matthew Waxman, Deputy Assistant Secretary of Defense for Detainee Affairs (2004–2005) (endorsed Joe Biden) Dov Zakheim, Under Secretary of Defense (Comptroller) (2001–2004) (endorsed Joe Biden)
Homeland Security Department officials
Kenneth Adelman Fmr Director, Arms Control and Disarmament Agency (1983–1987) (endorsed Joe Biden) Parney Albright, Assistant Secretary of Homeland Security for Science and Technology (2003–2005) (endorsed Joe Biden) Michael D. Brown, Administrator of the Federal Emergency Management Agency (2003–2005) (endorsed Joe Biden) James Loy, U.S. Deputy Secretary of Homeland Security (2003–2005), Administrator of the Transportation Security Administration (2002–2003), Commandant of the Coast Guard (1998–2002) (endorsed Joe Biden) John Mitnick, General Counsel of the Department of Homeland Security (2018–2019) (endorsed Joe Biden) Elizabeth Neumann, Deputy Chief of Staff of the Department of Homeland Security (2016–2020) (endorsed Joe Biden) Miles Taylor, Chief of Staff of the Department of Homeland Security (2017–2019), author known as "Anonymous" (endorsed Joe Biden)
Intelligence Community officials Jon D. Glassman National Security Advisor to the Vice President, U.S. Ambassador to Afghanistan (1983–86), United States Ambassador to Paraguay (1991–94) (endorsed Joe Biden) Michael Leiter, Director of the National Counterterrorism Center (2007–11) (endorsed Joe Biden)
Justice Department officials A. Brian Albritton, Middle District of Florida (2008–10) Donald B. Ayer, U.S. Deputy Attorney General (1989–90), U.S. Attorney for the Eastern District of California (1981–86) Daniel Bogden, U.S. Attorney for the District of Nevada (2009–17, 2001–06) (endorsed Joe Biden) Greg Brower, U.S. Attorney for the District of Nevada (2008–09), member of Nevada Senate (2011–16) (endorsed Joe Biden) Wayne Budd, District of Massachusetts (1989–92) (endorsed Joe Biden) Paul Charlton, U.S. Attorney for the District of Arizona (2001–06) (endorsed Joe Biden) James Comey, Director of the Federal Bureau of Investigation (2013–17), U.S. Deputy Attorney General (2003–05) (Independent since 2016, endorsed Joe Biden) Charles Fried, U.S. Solicitor General (1985–89) (endorsed Joe Biden) Jonathan L. Goldstein, U.S. Attorney for the District of New Jersey (1974–77) (endorsed Joe Biden) Thomas Heffelfinger, U.S. Attorney for the District of Minnesota (1991–93), (2001–06) (endorsed Joe Biden) David C. Iglesias, U.S. Attorney for the District of New Mexico (2001–06) (endorsed Joe Biden) Marcos Jimenez, U.S. Attorney for the Southern District of Florida (2002–05) (endorsed Joe Biden) David Kelley, U.S. Attorney for the Southern District of New York (2003–05) (endorsed Joe Biden) John McKay, U.S. Attorney for the Western District of Washington (2001–06) (endorsed Joe Biden) Jan Paul Miller, U.S. Attorney for the Central District of Illinois (2002–05) (endorsed Joe Biden) Matthew Orwig, U.S. Attorney for the Eastern District of Texas (2001–07) (endorsed Joe Biden) Paul Perez, U.S. Attorney for the Middle District of Florida (2002–07) (endorsed Joe Biden) Stanley Twardy, U.S. Attorney for the District of Connecticut (1985–91) (endorsed Joe Biden) Ken Wainstein, U.S. Attorney for the District of Columbia (2004–06) (endorsed Joe Biden) William H. Webster, Director of the Federal Bureau of Investigation (1978–87), U.S. Attorney for the Eastern District of Missouri (1960–61) (endorsed Joe Biden)
State Department officials Richard Armitage, U.S. Deputy Secretary of State (2001–05) (endorsed Joe Biden) John B. Bellinger III, Legal Adviser of the Department of State (2005–09) (endorsed Joe Biden) Robert Blackwill, U.S. Ambassador to India (2001–03) (endorsed Joe Biden) Richard Boucher, Assistant Secretary of State for South and Central Asian Affairs (2006–2009) (endorsed Joe Biden) Charles R. Bowers, U.S. Ambassador to Bolivia (1991–1994) (endorsed Joe Biden) Peter Bridges, U.S. Ambassador to Somalia (1984–1986) (endorsed Joe Biden) Richard Burt, U.S. Ambassador to Germany (1985–89) (endorsed Joe Biden) Jack Chow, former Special Representative of the U.S. Secretary of State on Global HIV/AIDS (endorsed Joe Biden) Eliot A. Cohen, Counselor of the Department of State (2007–09) (endorsed Joe Biden) Chester Crocker, Assistant Secretary of State for African Affairs (1981–89) (endorsed Joe Biden) Sada Cumber, Special Envoy to the Organisation of Islamic Cooperation (2008–09) (endorsed Joe Biden) Eric S. Edelman, Under Secretary of Defense for Policy (2005–09), U.S. Ambassador to Turkey (2003–05), U.S. Ambassador to Finland (1998–2001) (endorsed Joe Biden) Julie Finley, U.S. Ambassador to the Organization for Security and Cooperation in Europe (2005–2009) (endorsed Joe Biden) Carl W. Ford Jr., Assistant Secretary of State for Intelligence and Research (2001–2003) (endorsed Joe Biden) James Glassman, Under Secretary of State for Public Diplomacy (2008–09) (endorsed Joe Biden) Colleen Graffy, Deputy Assistant Secretary of State for Public Diplomacy in Europe and Eurasia (2004–09) (endorsed Joe Biden) Gordon Gray III, U.S. Ambassador to Tunisia (2009–12) (endorsed Joe Biden) Richard Kauzlarich Fmr Dep Asst Secretary of State (1984–86) United States Ambassador to Bosnia and Herzegovina (August 1, 1997 – August 20, 1999)(endorsed Joe Biden) James Kelly, Assistant Secretary of State for East Asian and Pacific Affairs (2001–05) (endorsed Joe Biden) David Kramer, Assistant Secretary of State for Democracy, Human Rights, and Labor (2008–09) (endorsed Joe Biden) Stephen Krasner, Director of Policy Planning (2005–07) (endorsed Joe Biden) Frank Lavin, U.S. Ambassador to Singapore (2001–05) (endorsed Joe Biden) Winston Lord, U.S. Ambassador to China (1984–1989) (endorsed Joe Biden) Brett McGurk, Special Presidential Envoy for the Global Coalition to Counter the Islamic State of Iraq and the Levant (2015–18) Alberto J. Mora, general counsel to the U.S. Information Agency (1989–1993) (endorsed Joe Biden) Douglas H. Paal, former member of the U.S. State Department Policy Planning Staff (endorsed Joe Biden) Kori Schake, Deputy Director of Policy Planning (2007–08) (endorsed Joe Biden)