A range of notable Republicans openly expressed opposition to President Donald Trump's 2024 campaign for president of the United States.
Former Trump administration officials
U.S. vice president
Mike Pence, U.S. vice president (2017–2021) under Trump, governor of Indiana (2013–2017), U.S. representative from IN-06 (2003–2013), U.S. representative from IN-02 (2001–2003) (ran against Trump in the Republican primaries)
Cabinet-level officials
Trump cabinet members who opposed his election in 2024 include: John Bolton, U.S. National Security advisor (2018–2019), Ambassador to the United Nations (2005–2006) Dan Coats, director of National Intelligence (2017–2019), U.S. senator from Indiana (1989–1999; 2011–2017) (endorsed Mike Pence) Mark Esper, U.S. secretary of defense (2019–2020), U.S. secretary of the Army (2017–2019)
Only half of Trump's first term cabinet officials endorsed his 2024 campaign.
White House officials
Alyssa Farah Griffin, White House director of strategic communications (2020), press secretary of the U.S. Department of Defense (2019–2020), press secretary to the vice president (2017–2019) and co-host of The View (endorsed Kamala Harris) Stephanie Grisham, White House communications director, chief of staff to the First Lady (2020-2021) and White House press secretary (2019–2020) (endorsed Kamala Harris) Sarah Matthews, deputy White House press secretary (2020–2021) (endorsed Kamala Harris) Anthony Scaramucci, White House communications director (2017) (endorsed Kamala Harris) Marc Short, chief of staff to the vice president (2019–2021) (endorsed Mike Pence)
Other executive branch officials Greg Brower, assistant director of the Federal Bureau of Investigation (2017), U.S. attorney for the District of Nevada (2008–2009) (endorsed Kamala Harris) John Mitnick, general counsel of the U.S. Department of Homeland Security (2018–2019) (endorsed Kamala Harris) Richard V. Spencer, U.S. secretary of the Navy (2017–2019) Olivia Troye, Homeland Security and Counterterrorism advisor and lead COVID-19 advisor to the vice president (2018–2020) (endorsed Kamala Harris) 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) (endorsed Kamala Harris)
Previous administration executive branch officials U.S. vice president
Dick Cheney, U.S. vice president (2001–2009), U.S. secretary of defense (1989–1993), U.S. representative from Wyoming's at-large congressional district (1979–1989), White House chief of staff (1975–1977), White House deputy chief of staff (1974–1975) (endorsed Kamala Harris)
Cabinet-level officials
William Cohen, U.S. secretary of defense (1997–2001), U.S. senator from Maine (1979–1997) (endorsed Kamala Harris) John Danforth, U.S. ambassador to the United Nations (2004–2005), U.S. senator from Missouri (1976–1995) Stuart M. Gerson, acting U.S. attorney general (1993), United States assistant attorney general for the Civil Division (1989–1993) (endorsed Kamala Harris) Alberto Gonzales, U.S. attorney general (2005–2007) (endorsed Kamala Harris) Chuck Hagel, U.S. secretary of defense (2013–2015), co-chair of President's Intelligence Advisory Board (2009–2013), U.S. senator from Nebraska (1997–2009) (endorsed Kamala Harris) Carla Anderson Hills, U.S. trade representative (1989–1993), U.S. secretary of housing and urban development (1975–1977) (endorsed Kamala Harris) Peter Keisler, acting U.S. attorney general (2007), United States assistant attorney general for the Civil Division (2003–2007), acting U.S. associate attorney general (2002–2003) (endorsed Kamala Harris) Ray LaHood, U.S. secretary of transportation (2009–2013), U.S. representative from IL-18 (1995–2009), member of the Illinois House of Representatives from the 72nd district (1982–1983) (endorsed Kamala Harris) John Negroponte, U.S. deputy secretary of state (2007–2009), director of National Intelligence (2005–2007), deputy National Security advisor (1987–1989) (endorsed Kamala Harris) William Howard Taft IV, acting U.S. secretary of defense (1989), legal adviser of the Department of State (2001–2005), U.S. ambassador to NATO (1989–1992), U.S. deputy secretary of defense (1984–1989) and great-grandson of President William Howard Taft (endorsed Kamala Harris) Ann Veneman, U.S. secretary of agriculture (2001–2005) (endorsed Kamala Harris) Robert Zoellick, U.S. trade representative (2001–2005), United States deputy secretary of state (2005–2006), White House deputy chief of staff (1992–1993) (endorsed Kamala Harris)
White House officials
Phillip D. Brady, White House staff secretary (1991–1993), White House cabinet secretary (1989) (endorsed Kamala Harris) James W. Cicconi, White House staff secretary (1989–1990) (endorsed Kamala Harris) Frank Donatelli, White House director of political and intergovernmental affairs (1987–1989) (endorsed Kamala Harris) Bobbie Kilberg, director of the Office of Public Liaison (1989–1992) (endorsed Chris Christie) Harriet Miers, White House counsel (2005–2007), White House deputy chief of staff (2003–2005), and White House staff secretary (2001–2003)
Other executive branch officials
John B. Bellinger III, legal adviser of the Department of State (2005–2009) (endorsed Kamala Harris) Robert D. Blackwill, U.S. ambassador to India (2001–2003) (endorsed Kamala Harris) Richard R. Burt, U.S. ambassador to West Germany (1985–1989), assistant secretary of state for European and Eurasian Affairs (1983–1985) (endorsed Kamala Harris) Eliot A. Cohen, counselor of the U.S. Department of State (2007–2009) (endorsed Kamala Harris) Chester Crocker, assistant secretary of state for African affairs (1981–1989) (endorsed Kamala Harris) Michael Donley, U.S. secretary of the Air Force (2008–2013) (endorsed Kamala Harris) Eric S. Edelman, under secretary of defense for policy (2005–2009), U.S. ambassador to Turkey (2003–2005), U.S. ambassador to Finland (1998–2001) (endorsed Kamala Harris) Richard A. Falkenrath, deputy assistant to the president and deputy Homeland Security advisor (2003–2004) (endorsed Kamala Harris) Jendayi Frazer, assistant secretary of state for African affairs (2005–2009), U.S. ambassador to South Africa (2004–2005) (endorsed Kamala Harris) Mary Kramer, U.S. ambassador to Barbados (2004–2006) (endorsed Nikki Haley) Frank Lavin, U.S. ambassador to Singapore (2001–2005), White House director of political affairs (1987–1989) (endorsed Nikki Haley) John Lehman, U.S. secretary of the Navy (1981–1987) Rosario Marin, U.S. treasurer (2001–2003), mayor of Huntington Park, California (1999–2000), member of the Huntington Park, California City Council (1994–2001) (endorsed Kamala Harris) Sean O'Keefe, administrator of NASA (2001–2004), secretary of the Navy (1992–1993) (endorsed Kamala Harris) Jeanne Phillips, U.S. ambassador to the OECD (2001–2002) Victor H. Reis, assistant director for National Security and Space in the Office of Science and Technology Policy (1981–1983) (endorsed Kamala Harris) Larry Thompson, U.S. deputy attorney general (2001–2003), U.S. attorney for the Northern District of Georgia (1982–1986) (endorsed Kamala Harris) Robert H. Tuttle, U.S. ambassador to the United Kingdom (2005–2009) (endorsed Kamala Harris) Matthew Waxman, deputy assistant secretary of defense for detainee affairs (2004–2005) (endorsed Kamala Harris)
Other administration officials and campaign staff
1,043 former high-ranking national security officials (endorsed Kamala Harris) (not all are Republican) 304 alumni for Reagan, Bush, McCain & Romney (endorsed Kamala Harris) 238 former officials and staff for U.S. Presidents George W. Bush (2001–2009) and George H. W. Bush (1989–1993), and U.S. presidential candidates Mitt Romney (2012) and John McCain (2008) (endorsed Kamala Harris) Over 100 former Republican national security officials (endorsed Kamala Harris) 17 former officials and staff for U.S. President Ronald Reagan (1981–1989) (endorsed Kamala Harris)
U.S. senators Current
Susan Collins, U.S. senator from Maine (1997–present) (wrote in Nikki Haley) Lisa Murkowski, U.S. senator from Alaska (2002–present) (endorsed Nikki Haley) Todd Young, U.S. senator from Indiana (2017–present), U.S. representative from IN-09 (2011–2017)
Former
Rudy Boschwitz, U.S. senator from Minnesota (1978–1991), U.S. ambassador to the United Nations Commission on Human Rights (2005–2006) (endorsed Nikki Haley) Jeffrey Chiesa, U.S. senator from New Jersey (2013), attorney general of New Jersey (2012–2013) (endorsed Chris Christie) Bob Corker, U.S. senator from Tennessee (2007–2019), mayor of Chattanooga (2001–2005) Jeff Flake, ambassador to Turkey (2022–2024), U.S. senator from Arizona (2013–2019), U.S. representative from AZ (2001–2013) (endorsed Kamala Harris) Judd Gregg, U.S. senator from New Hampshire (1993–2011), governor of New Hampshire (1989–1993) (endorsed Nikki Haley) Gordon J. Humphrey, U.S. senator from New Hampshire (1979–1990) (Independent since 2016) (endorsed Kamala Harris) Nancy Kassebaum, U.S. senator from Kansas (1978–1997) (endorsed Kamala Harris) George LeMieux, U.S. senator from Florida (2009–2011) (endorsed Ron DeSantis) Mack Mattingly, U.S. senator from Georgia (1981–1987), U.S. ambassador to Seychelles (1992–1993), chair of the Georgia Republican Party (1975–1977) Rob Portman, U.S. senator from Ohio (2011–2023), director of the Office of Management and Budget (2006–2007), U.S. trade representative (2005–2006), U.S. representative from OH-02 (1993–2005), White House director of legislative affairs (1989–1991) (endorsed Nikki Haley) Mitt Romney, U.S. senator from Utah (2019-2025), 2012 nominee for president, chair of the Republican Governors Association (2005–2006), governor of Massachusetts (2003–2007) (did not vote for Trump in general election) Alan Simpson, U.S. senator from Wyoming (1979–1997) John E. Sununu, U.S. senator from New Hampshire (2003–2009), U.S. representative from NH-01 (1997–2003) (endorsed Nikki Haley) Pat Toomey, U.S. senator from Pennsylvania (2011–2023), U.S. representative from PA-15 (1999–2005) (did not vote for Trump in general election)
U.S. representatives Current
Greg Pence, U.S. representative from IN-06 (2019–2025) (endorsed Mike Pence, his brother) David Valadao, U.S. representative from CA-22 (2023–present), U.S. representative from CA-21 (2013–2019, 2021–2023) (did not vote for Trump in general election)
Former
Gresham Barrett, U.S. representative from SC-03 (2003–2011) (endorsed Nikki Haley) John Boehner, speaker of the U.S. House of Representatives (2011–2015), U.S. representative from OH-08 (1991–2015) Charles Boustany, U.S. representative from LA-07 (2005–2013) and LA-03 (2013–2017) (endorsed Kamala Harris) Mo Brooks, U.S. representative from AL-05 (2011–2023), Madison County commissioner (1996–2011) Susan Brooks, U.S. representative from IN-05 (2013–2021) (endorsed Chris Christie) Ken Buck, CO-04 (2015–2024), chair of the Colorado Republican Party (2019–2021) Rod Chandler, WA-08 (1983–1993), member of the Washington House of Representatives from the 45th district (1975–1983) (endorsed Kamala Harris) Liz Cheney, U.S. representative from WY-AL (2017–2023), chair of the House Republican Conference (2019–2021) (endorsed Kamala Harris) Tom Coleman, MO-06 (1976–1993), member of the Missouri House of Representatives from the 21st district (1973–1976) (endorsed Kamala Harris) Barbara Comstock, U.S. representative from VA-10 (2015–2019) (endorsed Kamala Harris) Tom DeLay, U.S. representative from TX-22 (1985–2006) (endorsed Randall Terry) Charlie Dent, U.S. representative from PA-15 (2005–2018) (endorsed Kamala Harris) Charles Djou, U.S. representative from HI-01 (2010–2011) (endorsed Kamala Harris)