A number of prominent Republicans are vowing to never back Donald Trump
Donald TrumpPoll: Most support path to legal status for illegal immigrants GOP rep splits with Trump on Meals on Wheels THE MEMO: GOP breaks from Trump in 'wiretap' furor 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.
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 Amash
Justin AmashRep. Steve King: GOP colleagues 'patting me on the back' after controversy Ryan-aligned group targets conservatives with robocalls Dem blasts Rep. King’s 'somebody else’s babies' comments on House floor 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 Rubio
Marco RubioTHE MEMO: GOP breaks from Trump in 'wiretap' furor Shutdown politics return to the Senate Senate marks six years of Syrian civil war, asks for WH plan to end conflict 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 Flake
Jeff FlakeWashington must help the Navajo Nation prevent the loss of coal jobs Judicial Conference recommends 5 additional judges for Calif. appeals court Overnight Tech: Ad industry urges Congress to eliminate FCC privacy rules | Yahoo offers Google help in data fight | Facebook bans use of its data for surveillance 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 Graham
Lindsey GrahamShutdown politics return to the Senate FBI chief expected to deny wiretapping claim, Dem says Graham: Trump should take travel ban issue to Supreme Court 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 Kirk
Mark KirkObamaCare repeal bill would defund Planned Parenthood Leaked ObamaCare bill would defund Planned Parenthood GOP senator won't vote to defund Planned Parenthood 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 Ribble
Reid 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 Rigell
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 McCain
John McCainShutdown politics return to the Senate Overnight Defense: Trump seeks B more for 2017 defense spending | Boeing VP tapped for Pentagon post Protect lives, U.S. credibility: Pass the Keeping Our Promise to Our Afghan Allies Act 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 Cruz
Ted CruzSen. Susan Collins comes out against House GOP healthcare bill Trump to Michigan gov: 'I never forget' those who didn't endorse me Cruz, Freedom Caucus chairman lay out health plan demands: 'The time to act is now upon us' MORE
Connor Walsh, former digital director for former Rep. Eric Cantor
Eric CantorPaul replaces Cruz as GOP agitator GOP shifting on immigration Breitbart’s influence grows inside White House 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.