Here is partial list of Republicans against Trump.

This is a list of Republicans and conservatives/independents who have openly expressed opposition to former President Donald Trump's 2024 campaign for President of the United States.

• Dan Coats, Director of National Intelligence (2017–2019), U.S. Senator from Indiana (1989–1999; 2011–2017) (endorsed Mike Pence)[5][6]
• Mark Esper, U.S. Secretary of Defense (2019–2020), U.S. Secretary of the Army (2017–2019)[7][8]
• John F. Kelly, White House Chief of Staff (2017–2019), U.S. Secretary of Homeland Security (2017) (Independent)[9][10]

• H. R. McMaster, U.S. National Security Advisor (2017–2018)[11]

• Ty Cobb, White House Special Counsel (2017–2018), Assistant U.S. Attorney for the District of Maryland in (1981–1986) (would 'vote for Biden')[12]
• 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)[13]
• Stephanie Grisham, White House Communications Director and White House Press Secretary (2019–2020) (endorsed Kamala Harris)[14][15]
• Cassidy Hutchinson, executive assistant to the White House Chief of Staff (2020–2021)[16] (endorsed Kamala Harris)[17][18]
• Sarah Matthews, Deputy White House Press Secretary (2020–2021) (endorsed Kamala Harris)[19][20][21]
• Omarosa Manigault Newman, Communications Director of the Office of Public Liaison (2017–2018), reality TV star (endorsed Kamala Harris)[22]
• Anthony Scaramucci, White House Communications Director (2017) (endorsed Kamala Harris)[23]
• Marc Short, Chief of Staff to the Vice President (2019–2021) (endorsed Mike Pence)[24]

• Greg Brower, Assistant Director of the Federal Bureau of Investigation (2017), U.S. Attorney for the District of Nevada (2008-2009) (endorsed Kamala Harris)[25]
• James Comey, Director of the Federal Bureau of Investigation (2013–2017), U.S. Deputy Attorney General (2003–2005), U.S. Attorney for the Southern District of New York (2002–2003) (endorsed Kamala Harris)[26]
• Ronald Gidwitz, Acting U.S. Ambassador to the European Union (2020–2021), U.S. Ambassador to Belgium (2018–2021), chair of the Illinois State Board of Education (1999–2003) (endorsed Chris Christie)[27]
• Sofia Kinzinger, Press Secretary U.S. Department of Homeland Security (2020), Strategic Media Director, Office of the U.S. Vice President (2018-2020) (endorsed Kamala Harris)[28][29]
• Andrew McCabe, Deputy (and Acting) Director of the Federal Bureau of Investigation (2016–2018), (thinks Trump may be a Russian asset)[30]
• Elizabeth Neumann, DHS Assistant Secretary for Counterterrorism and Threat Prevention (2018–2020), DHS Deputy Chief of Staff (2017–2018), Homeland Security Council (2003–2006)[31] (endorsed Kamala Harris)[32]
• Richard V. Spencer, U.S. Secretary of the Navy (2017–2019)[33]
• Miles Taylor, Chief of Staff of the U.S. Department of Homeland Security (2019)[34][32] (endorsed Kamala Harris)
• Jay Town, U.S. Attorney for the Northern District of Alabama (2017–2020)[35]
• Olivia Troye, Homeland Security and Counterterrorism advisor and lead COVID-19 advisor to the Vice President (2018–2020) (endorsed Kamala Harris)[36][15]
• 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)[25]

• 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)[37] (endorsed Kamala Harris)

• Dan Quayle, 44th Vice President of the US (1989-1993), U.S. Senator from Indiana (1981-1989), U.S. Representative from Indiana's 4th congressional district (1977-1981)[38]

• William Cohen, U.S. Secretary of Defense (1997–2001), U.S. Senator from Maine (1979–1997) (endorsed Kamala Harris)[39]
• John Danforth, U.S. Ambassador to the United Nations (2004–2005), U.S. Senator from Missouri (1976–1995)[39]
• Alberto Gonzales, U.S. Attorney General (2005–2007)[40] (endorsed Kamala Harris)[41]
• 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)[42]
• 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)[15]
• 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)[25]

• Ashley Davis, White House Deputy Director of Management and Administration (2001–2003) (endorsed Nikki Haley)[43]
• Bobbie Kilberg, Director of the Office of Public Liaison (1989–1992) (endorsed Chris Christie)[44]
• Harriet Miers, White House Counsel (2005–2007), White House Deputy Chief of Staff (2003–2005), and White House Staff Secretary (2001–2003)[45]

• Robert D. Blackwill, U.S. Ambassador to India (2001–2003) (endorsed Kamala Harris)[46]
• Michael E. Guest, U.S. Ambassador to Romania (2001–2004) (endorsed Kamala Harris)[46]
• Mary Kramer, U.S. Ambassador to Barbados (2004–2006) (endorsed Nikki Haley)[47]
• Frank Lavin, U.S. Ambassador to Singapore (2001–2005), White House Director of Political Affairs (1987–1989) (endorsed Nikki Haley)[48]
• John Lehman, U.S. Secretary of the Navy (1981–1987)[49]
• 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)[50]
• John McKay, U.S. Attorney for the Western District of Washington (2001–2007) (endorsed Kamala Harris)
• Jeanne Phillips, U. S. Ambassador to the OECD (2001–2002)[45]

• 741 former high-ranking national security officials (endorsed Kamala Harris) (not all are Republican/conservative)[51]
• 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)[52][53]
• 111 alumni for Reagan, Bush, McCain & Romney (endorsed Kamala Harris)[25]
• Over 100 former Republican national security officials (endorsed Kamala Harris)[54][55]
• 17 former officials and staff for U.S. President Ronald Reagan (1981-1989) (endorsed Kamala Harris)[56]

• Susan Collins, U.S. Senator from Maine (1997–present)[58] (will write-in Nikki Haley)[59]
• Jerry Moran, U.S. Senator from Kansas (2011–present), U.S. Representative from KS-01 (1997–2011)[60]
• Lisa Murkowski, U.S. Senator from Alaska (2002–present) (endorsed Nikki Haley)[61]
• Mitt Romney, U.S. Senator from Utah (2019–present), 2012 nominee for president, Chair of the Republican Governors Association (2005–2006), Governor of Massachusetts (2003–2007)[62] (will not vote for Trump in general election)[63]
• Todd Young, U.S. Senator from Indiana (2017–present), U.S. Representative from IN-09 (2011–2017)[64]

• 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)[65]
• Jeffrey Chiesa, U.S. Senator from New Jersey (2013), Attorney General of New Jersey (2012–2013) (endorsed Chris Christie)[66]
• Bob Corker, U.S. Senator from Tennessee (2007–2019), Mayor of Chattanooga (2001–2005)[67]
• Jeff Flake, Ambassador to Turkey (2022–2024), U.S. Senator from Arizona (2013–2019), U.S. Representative from AZ (2001–2013) (endorsed Kamala Harris)[68][69]
• Cory Gardner, U.S. Senator from Colorado (2015–2021), and U.S. Representative from CO-04 (2011–2015) (endorsed Tim Scott)[70]
• Judd Gregg, U.S. Senator from New Hampshire (1993–2011), Governor of New Hampshire (1989–1993) (endorsed Nikki Haley)[71]
• Gordon J. Humphrey, U.S. Senator from New Hampshire (1979–1990) (endorsed Nikki Haley)[72]
• Nancy Kassebaum, U.S. Senator from Kansas (1978–1997) (endorsed Kamala Harris)[73][74]
• George LeMieux, U.S. Senator from Florida (2009–2011) (endorsed Ron DeSantis)[75]
• 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)[76]
• Alan Simpson, U.S. Senator from Wyoming (1979–1997)[39]
• John E. Sununu, U.S. Senator from New Hampshire (2003–2009), U.S. Representative from NH-01 (1997–2003) (endorsed Nikki Haley)[77]
• Pat Toomey, U.S. Senator from Pennsylvania (2011–2023), U.S. Representative from PA-15 (1999–2005) (will not vote for Trump in general election)[78][79]

• Thomas Massie, U.S. Representative from KY-04 (2012–present) (endorsed Ron DeSantis)[80]
• Greg Pence, U.S. Representative from IN-06 (2019–present) (endorsed Mike Pence, his brother)[81]
• David Valadao, U.S. Representative from CA-22 (2023–present), U.S. Representative from CA-21 (2013–2019, 2021–2023)[82] (will not vote for Trump in general election)

• John Boehner, Speaker of the U.S. House of Representatives (2011–2015), U.S. Representative from OH-08 (1991–2015)[84][85]
• Charles Boustany, U.S. Representative from LA-07 (2005–2013) and LA-03 (2013-2017) (endorsed Kamala Harris)[25]
• Mo Brooks, U.S. Representative from AL-05 (2011–2023), Madison County Commissioner (1996–2011)[86]
• Susan Brooks, U.S. Representative from IN-05 (2013–2021) (endorsed Chris Christie)[87]
• Rod Chandler, WA-08 (1983–1993), member of the Washington House of Representatives from the 45th district (1975–1983) (endorsed Kamala Harris)[15]
• Liz Cheney, U.S. Representative from WY-AL (2017–2023), Chair of the House Republican Conference (2019–2021) (endorsed Kamala Harris)[88]
• Tom Coleman, MO-06 (1976–1993), member of the Missouri House of Representatives from the 21st district (1973–1976) (endorsed Kamala Harris)[15]
• Barbara Comstock, U.S. Representative from VA-10 (2015–2019) (endorsed Kamala Harris)[89][90]
• Tom DeLay, U.S. Representative from TX-22 (1985–2006) (endorsed Randall Terry)[91]
• Charles Djou, U.S. Representative from HI-01 (2010–2011) (endorsed Kamala Harris)[25]
• Mickey Edwards, U.S. Representative from OK-05 (1977–1993)(endorsed Kamala Harris)[25]
• David Emery, U.S. Representative from ME-01 (1975–1983) (endorsed Kamala Harris)[92]
• Mike Gallagher, U.S. Representative from WI-08 (2017–2024)[93]
• Wayne Gilchrest, MD-01 (1991–2009) (endorsed Kamala Harris)[15]
• Anthony Gonzalez, U.S. Representative from OH-16 (2019–2023)[94]
• Jim Greenwood, PA-08 (1993–2005), member of the Pennsylvania House of Representatives from the 143rd district (1981–1986), member of the Pennsylvania Senate from the 10th district (1987–1993) (endorsed Kamala Harris)[15]
• Will Hurd, U.S. Representative from TX-23 (2015–2021) (former candidate for president, endorsed Haley)[95][96][97] (will not vote for Trump in general election)
• Bob Inglis, six term U.S. Representative from SC-04 (1993-1999, 2005-2011) (endorsed Kamala Harris)[98]
• John Katko, U.S. Representative from NY-24 (2015–2023)[99][100]
• Adam Kinzinger, U.S. Representative from IL-16 (2013–2023), U.S. Representative from IL-11 (2011–2013) (endorsed Kamala Harris)[101][20]
• John LeBoutillier, NY-06 (1981–1983) (endorsed Kamala Harris)[15]
• Mia Love, U.S. Representative from UT-04 (2015–2019)[102]
• Dan Miller, U.S. Representative from FL-13 (1993–2003) (endorsed Kamala Harris)[25]
• Susan Molinari, NY-13 (1993–1997), NY-14 (1991–1993), Vice Chair of the House Republican Conference (1995–1997), member of the New York City Council from the 1st district (1986–1990) (endorsed Kamala Harris)[15]
• Bill Paxon, U.S. Representative from NY-31 (1989-1993) and NY-27 (1993-1999) (endorsed Kamala Harris)[25]
• Jack Quinn, NY-30 (1993–2005) (endorsed Kamala Harris)[15]
• Dave Reichert, WA-08 (2005–2019) (will not vote for Trump in general election)[103]
• Tom Rice, U.S. Representative from SC-07 (2013–2023)[104]
• Denver Riggleman, VA-05 (2019–2021) (independent since 2022, endorsed Kamala Harris)[15]
• Paul Ryan, Speaker of the U.S. House of Representatives (2015–2019), U.S. Representative from WI-01 (1999–2019), 2012 nominee for Vice President (will not vote for Trump in general election)[105][106]
• Joe Scarborough, U.S. Representative from FL-01 (1995–2001), host of Morning Joe (independent since 2017) (endorsed Kamala Harris)[107][108]
• Claudine Schneider, RI-02 (1981–1991) (endorsed Kamala Harris)[15]
• Chris Shays, CT-4 (1987–2009) (endorsed Kamala Harris)[46]
• Peter Smith, VT-AL (1989–1991), Lt. Governor of Vermont (1983–1987) (endorsed Kamala Harris)[15]
• Alan Steelman, TX-05 (1973–1977) (endorsed Kamala Harris)[15]
• David Trott, MI-11 (2015–2019) (endorsed Kamala Harris)[15]
• Fred Upton, U.S. Representative from MI-06 (1993–2023), U.S. Representative from MI-04 (1987–1993)[109]
• Joe Walsh, U.S. Representative from IL-08 (2011–2013), candidate for president in 2020 (endorsed Kamala Harris)[110][111][112]

• Phil Scott, Governor of Vermont (2017–present), Lieutenant Governor of Vermont (2011–2017) (endorsed Nikki Haley)[114]

• Charlie Baker, Governor of Massachusetts (2015–2023) and President of NCAA (2023–present)[115]
• Jeb Bush, Governor of Florida (1999–2007), candidate for president in 2016[116][117]
• Arne Carlson, Governor of Minnesota (1991–1999) (endorsed Kamala Harris)[118]
• Chris Christie, Governor of New Jersey (2010–2018), U.S. Attorney for the District of New Jersey (2002–2008)[119][120] (will not vote for Trump in general election)
• Jim Edgar, Governor of Illinois (1991–1999) (endorsed Kamala Harris)[121]
• Bill Haslam, Governor of Tennessee (2011–2019), chair of the Republican Governors Association (2017–2018)[122] (endorsed Tim Scott)
• Larry Hogan, Governor of Maryland (2015–2023), Chair of the National Governors Association (2019–2020)[123][124][125] (endorsed Nikki Haley) (will not vote for Trump in general election)
• Asa Hutchinson, Governor of Arkansas (2015–2023), Administrator of the Drug Enforcement Administration (2001–2003), U.S. Representative from AR-03 (1997–2001)[126] (will not vote for Trump in general election)
• John Kasich, Governor of Ohio (2011–2019), 2000 and 2016 candidate for president, Chair of the U.S. House Budget Committee (1995–2001), U.S. Representative from OH-12 (1983–2001) (endorsed Kamala Harris) [127]
• Pat McCrory, Governor of North Carolina (2013–2017)[128]
• James G. Martin, Governor of North Carolina (1985–1993)[129]
• George Pataki, Governor of New York (1995–2006), candidate for president in 2016[130][131]
• Marc Racicot, Governor of Montana (1993–2001), chair of the RNC (2001–2003)[132]
• Bruce Rauner, Governor of Illinois (2015–2019)[133] (endorsed Nikki Haley)
• Mark Sanford, Governor of South Carolina (2003–2011), U.S. Representative from SC-01 (1995–2001 and 2013–2019), Republican candidate for U.S. President in 2020[70]
• Arnold Schwarzenegger, Governor of California (2003–2011), actor[134][135]
• Bill Weld, Governor of Massachusetts (1991–1997), candidate for president in 2020 (endorsed Kamala Harris)[136]
• Christine Todd Whitman, Governor of New Jersey (1994–2001), Administrator of the Environmental Protection Agency (2001–2003) (Forward Since 2022, endorsed Kamala Harris) [137]

• John Dougall, Auditor of Utah (2013–present), Utah State Representative from District 27 (2003–2013) (endorsed Ron DeSantis)[138]
• Deidre Henderson, Lieutenant Governor of Utah (2021–present) (declined to endorse Trump)[139]
• Roby Smith, Treasurer of Iowa (2023–present) (endorsed Vivek Ramaswamy)[140]

• Geoff Duncan, Lieutenant Governor of Georgia (2019–2023), Member of the Georgia House of Representatives (2013–2017)[141] (endorsed Kamala Harris)[142][143]
• Kerry Healey, Lieutenant Governor of Massachusetts (2003-2007), 2006 Republican nominee for Governor of Massachusetts[144]
• Adam Laxalt, Attorney General of Nevada (2015–2019), 2022 nominee for U.S. Senator from Nevada and 2018 nominee for Governor of Nevada (endorsed Ron DeSantis)[145]
• Bob Orr, former associate justice of the North Carolina Supreme Court (1995–2004) (endorsed Kamala Harris)[146]
• Sandy Praeger, former Kansas Insurance Commissioner (2003-2015) (endorsed Kamala Harris)[74]
• Corey Stapleton, 2024 candidate for president, Secretary of State of Montana (2017–2021)[147]
• Michael Steele, Lieutenant Governor of Maryland (2003–2007), Chair of the RNC (2009–2011), co-host of MSNBC's The Weekend[148] (endorsed Kamala Harris)[149]
• Cate Zeuske, Secretary of the Wisconsin Department of Revenue (1996–2001), Treasurer of Wisconsin (1991–1995), Deputy Secretary of the Wisconsin Department of Administration (2015–2018), Wisconsin State Assemblywoman from District 4 (1985–1991) and District 54 (1983–1985) (endorsed Ron DeSantis)[150]

• Ashley Bartley, member of the Vermont House of Representatives from Franklin District 1 (2023–present)[151]
• Dan Wolf, member of the New Hampshire House of Representatives from the Merrimack 5th district (2016–present) (endorsed Kamala Harris)[152]

• Russell Bowers, member of the Arizona Senate from the 21st district (1997–2003), member of the Arizona House of Representatives from the 21st district (1993–1997) and the 25th district (2015–2023)[153]
• Becky Edwards, Utah state representative from the 20th district (2009–2018)[154]
• Peter Mills, Maine state senator from the 26th district (1996–2010) (endorsed Kamala Harris)[155]
• Doug Coleman, member of the Arizona House of Representatives from the 16th district (2013–2019) and former mayor of Apache Junction, Arizona (1995–2007) (endorsed Kamala Harris)[156]
• Paula Dockery, member of the Florida State Senate from the 17th district (2002–2012), member of the Florida House of Representatives from the 64th District (1996–2002) (Republican until 2017) (endorsed Kamala Harris)[157]
• Susan Gerard, member of the Arizona Senate from the 18th district (2001–2003), member of the Arizona House of Representatives from the 18th district (1989–2001) (endorsed Kamala Harris)[156]
• Deb Gullett, member of the Arizona House of Representatives from the 11th district (2003–2005) and from the 18th district (2001–2003) (endorsed Kamala Harris)[156]
• Pete Hershberger, member of the Arizona House of Representatives from the 26th district (2001–2008) (endorsed Kamala Harris)[156]
• Joel John, member of the Arizona House of Representatives from the 4th district (2021–2023) (endorsed Kamala Harris)[156]
• Roger Katz, member of the Maine Senate from the 15th district (2014–2018) and from the 24th district (2010–2014) (endorsed Kamala Harris)[158]
• Steve May, member of the Arizona House of Representatives from the 26th district (1999–2003) (endorsed Kamala Harris)[156]
• John S. McCollister, member of the Nebraska Legislature from the 20th district (2015–2023) (endorsed Kamala Harris)[159][better source needed]
• Peter Mills, member of the Maine Senate from the 26th district (1996–2010) (endorsed Kamala Harris)[158]