Republicans vowing to never back Trump

A number of prominent Republicans are vowing to never back Donald TrumpDonald John TrumpFive takeaways from Cruz, O'Rourke's debate showdown Arpaio files libel suit against New York Times IMF's Christine Lagarde delays trip to Middle East MORE even as he closes in on the GOP presidential nomination.

The "Never Trump" ranks include lawmakers, party operatives, pundits and GOP donors — and the movement even sparked a popular hashtag on social media.

They are convinced Trump as standard-bearer would lead the GOP to a devastating defeat in November, costing the party the Senate and potentially the House.

But there are also growing signs many in the GOP establishment are warming to the presumptive nominee. Trump's been endorsed by 14 lawmakers, with others regularly attending Capitol Hill meetings with his staff.

Republican National Committee (RNC) Chairman Reince Priebus has criticized the Never Trump movement as well. "It is essential to victory in November that we all support our candidate," Priebus said at the RNC's spring meeting.

Here's a list of prominent Republicans who won't vote for Trump. 

Last updated on Aug. 3 at 10:30 a.m.

Rep. Justin AmashJustin AmashWatchdog files Hatch Act complaint against Sanders for picture with Kanye in MAGA hat Cook Political Report shifts 7 more races towards Dems Rand Paul ramps up his alliance with Trump MORE (Mich.)

Gov. Charlie Baker (Mass.)

Brian Bartlett, former Mitt Romney aide and GOP communications strategist

Glenn Beck, radio host

Michael Berry, radio host

Max Boot, former foreign policy adviser to Sen. Marco RubioMarco Antonio RubioSaudi mystery drives wedge between Trump, GOP Overnight Defense: Trump worries Saudi Arabia treated as 'guilty until proven innocent' | McConnell opens door to sanctions | Joint Chiefs chair to meet Saudi counterpart | Mattis says Trump backs him '100 percent' Dems can use subpoena power to reclaim the mantle of populism MORE (R-Fla.)

Brent Bozell, conservative activist

Former Gov. Jeb Bush (Fla.)

Bruce Carroll, creator GayPatriot.org

Jay Caruso, RedState

Mona Charen, senior fellow at Ethics and Public Policy Center

Linda Chavez, columnist

Dean Clancy, former FreedomWorks vice president

Eliot Cohen, former George W. Bush official

Former Sen. Norm Coleman (Minn.)

Charles C. W. Cooke, writer for National Review

Doug Coon, Stay Right podcast

Rory Cooper, GOP strategist, managing director Purple Strategies

Jim Cunneen, former Calif. assemblyman

Rep. Carlos Curbelo (Fla.)

Steve Deace, radio host

Rep. Bob Dold (Ill.)

Ross Douthat, New York Times columnist

Erick Erickson, writer

Sen. Jeff FlakeJeffrey (Jeff) Lane FlakeIMF's Christine Lagarde delays trip to Middle East Saudi mystery drives wedge between Trump, GOP Election Countdown: Dems outraise GOP in final stretch | 2018 midterms already most expensive in history | What to watch in second Cruz-O'Rourke debate | Trump raises 0M for reelection | Why Dems fear Avenatti's approach MORE (Ariz.)

Mindy Finn, president, Empowered Women

Daniel Foster, contributing editor National Review Online

David French, writer at National Review

Jon Gabriel, editor-in-chief, Ricochet.com

Sen. Lindsey GrahamLindsey Olin GrahamSaudi mystery drives wedge between Trump, GOP Suspects in journalist's disappearance linked to Saudi crown prince: report Overnight Defense: Trump worries Saudi Arabia treated as 'guilty until proven innocent' | McConnell opens door to sanctions | Joint Chiefs chair to meet Saudi counterpart | Mattis says Trump backs him '100 percent' MORE (S.C.)

Michael Graham, radio host

Jonah Goldberg, writer

Alan Goldsmith, former staffer, House Committee on Foreign Affairs.

Stephen Gutowski, writer Washington Free Beacon

Rep. Richard Hanna (N.Y.)

Jamie Brown Hantman, former special assistant for legislative affairs for President George W. Bush

Stephen Hayes, senior writer at The Weekly Standard

Doug Heye, former RNC communications director

Quin Hillyer, contributing editor at National Review Online; senior editor at the American Spectator

Gov. Larry Hogan (Md.)

Ben Howe, RedState writer

Former Rep. Bob Inglis (S.C.)

Cheri Jacobus, GOP consultant and former Hill columnist

Robert Kagan, former Reagan official

Randy Kendrick, GOP donor

Matt Kibbe, former FreedomWorks CEO

Rep. Adam Kinzinger (R-Ill.)

Sen. Mark KirkMark Steven KirkThis week: Trump heads to Capitol Hill Trump attending Senate GOP lunch Tuesday High stakes as Trump heads to Hill MORE (R-Ill.) 

Philip Klein, managing editor at the Washington Examiner

Bill Kristol, The Weekly Standard editor

Frank Lavin, former Reagan aide

Mark Levin, radio host

Justin LoFranco, former Scott Walker aide

Kevin Madden, former Mitt Romney aide

Bethany Mandel, senior contributor at The Federalist

Tucker Martin, former Gov. Bob McDonnell's (R-Va.) communications director

Former RNC Chairman Mel Martínez (Fla.)

Liz Mair, GOP strategist

Lachlan Markey, writer for the Free Beacon

David McIntosh, Club for Growth president

Dan McLaughlin, editor at RedState.com

Ken Mehlman, former RNC chairman

Tim Miller, Our Principles PAC

Joyce Mulliken, former Washington state senator

Ted Newton, political consultant & former Mitt Romney aide

James Nuzzo, former White House aide

Katie Packer, chairwoman of Our Principles PAC

Former Gov. George Pataki (N.Y.)

Former Rep. Ron Paul (Texas)

Katie Pavlich, Townhall editor and Hill columnist

Art Pope, GOP donor

Brittany Pounders, conservative writer

Tomás Regalado, Mayor of Miami

Rep. Reid RibbleReid James RibbleWith Trump, conservatives hope for ally in 'War on Christmas' GOP rushes to embrace Trump House stays Republican as GOP limits losses MORE (Wis.)

Marlene Ricketts, GOP donor

Former Gov. Tom Ridge (Pa.)

Rep. Scott RigellEdward (Scott) Scott RigellGOP rushes to embrace Trump GOP lawmaker appears in Gary Johnson ad Some in GOP say Trump has gone too far MORE (Va.)

Mitt Romney, 2012 GOP presidential nominee

Rep. Ileana Ros-Lehtinen (Fla.)

Paul Rosenzweig, former deputy assistant secretary, Department of Homeland Security

Jennifer Rubin, Washington Post conservative blogger

Patrick Ruffini, partner, Echelon Insights

Sarah Rumpf, former BreitBart contributor

Mark Salter, writer and former aide to John McCainJohn Sidney McCainComey donates maximum amount to Democratic challenger in Virginia House race Live coverage: McSally clashes with Sinema in Arizona Senate debate Is there difference between good and bad online election targeting? MORE

Rep. Mark Sanford (S.C.)

Sen. Ben Sasse (Neb.)

Elliott Schwartz, Our Principles PAC

Gabriel Schoenfeld, senior fellow, Hudson Institute

Tara Setmayer, CNN analyst and former GOP staffer

Ben Shapiro, editor-in-chief The Daily Wire

Evan Siegfried, GOP strategist and commentator

Ben Stein, actor and political commentator

Brendan Steinhauser, GOP consultant

Stuart Stevens, former Romney strategist

Paul Singer, GOP donor

Erik Soderstrom, former field director for Carly Fiorina

Charlie Sykes, radio host

Brad Thor, writer

Michael R. Treiser, former Mitt Romney aide

Daniel P. Vajdich, former national security adviser to Ted CruzRafael (Ted) Edward CruzFive takeaways from Cruz, O'Rourke's debate showdown O'Rourke's mom discusses past Dem votes after labeled 'lifelong Republican' by son Live coverage: Cruz faces O'Rourke in Texas debate showdown MORE

Connor Walsh, former digital director for former Rep. Eric CantorEric Ivan CantorFormer TV journalist gives GOP rare dose of hope in Florida Dave Brat trailing in reelection bid Fake political signs target Democrat in Virginia MORE (R-Va.), founder Build Digital

Former Rep. J.C. Watts (Okla.)

Peter Wehner, New York Times contributor

Former Gov. Christine Todd Whitman (N.J.)

Meg Whitman, president and CEO of Hewlett-Packard 

George Will, writer

Rick Wilson, Republican strategist 

Nathan Wurtzel, Make America Awesome super-PAC

Bill Yarbrough, chairman of the Republican Liberty Caucus of Ohio

Dave Yost, Ohio auditor of state

An earlier version incorrectly included Dana Loesch.

Please send updates to mmali@thehill.com.