New York (TheStreet) -- Republican presidential candidate Donald Trump, a billionaire who grew even more famous firing people on The Apprentice, has found his campaign-trail enemies aren't so easy to get rid of.

For the most part, he has his own mouth to thank: He described Mexican immigrants as rapists and criminals, criticized Republican opponent Carly Fiorina's face and made comments suggesting Fox anchor Megyn Kelly asked him tough questions during a debate because of her menstrual cycle.

All that hasn't kept from, well, trumping his opponents in Republican polls, however. He's leading in swing states like Ohio, Pennsylvania, and Florida, according to a recently released Quinnipiac University Swing State Poll

That scares IAC Interactive founder Barry Diller so much that he's threatened to leave the U.S. rather than refer to "The Donald" as "Mr. President."  

"If Donald Trump doesn't fall, I'll either move out of the country or join the resistance," Diller, whose $5.8 billion media company hosts dating sites like Match and Tinder, said at a Bloomberg Markets conference this week.

Don't panic yet, Barry: Even if Trump wins the Republican nomination, he'd still have to face off against potential Democratic opponents from Hillary Clinton to Sen. Bernie Sanders and Vice President Joe Biden.

If the worst still comes to pass, Diller probably won't have to leave by himself. Take a look at these prominent figures who might get on an outward-bound flight with him:

1. Shakira

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The Colombian singer whose "Hips Don't Lie" might use them to propel herself out of the U.S. if Trump moves into the White House. After Trump's widely criticized speech on Mexican immigrants -- which included the line, "When Mexico sends its people, they're not sending their best" -- Shakira took to Twitter to vent.

"No one living in this century should stand behind so much ignorance," she tweeted. "This is a hateful and racist speech that attempts to divide a country that for years has promoted diversity and democracy!"

2. Emily Blunt

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British-born actress Emily Blunt received her US citizenship in August. At the Toronto International Film Festival last September, the Hollywood Reporter asked Blunt what she thought about Trump becoming president.

Her response:

"I became an American citizen recently, and that night, we watched the Republican debate and I thought, 'This was a terrible mistake. What have I done?'"

3. Bill Maher

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It's probably no secret that comedian and talk show host Bill Maher wouldn't be the first in line to vote for Trump. Not only has the liberal host of HBO's Real Time expressed disdain for Trump's candidacy during his own sarcastic monologues, he said on MSNBC's Hardball with Chris Matthews that Trump is the reason other countries are making fun of the U.S. 

"This is why they are laughing at us: Because of what he says and how we are taking it seriously," Maher said in the interview. "These are just the brain farts, the stream-of-consciousness ramblings of a guy who obviously has over the course of his life breathed in too much construction debris." 

4. Neil Young

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Somehow, legendary rock-and-roll singer Neil Young's 1989 classic Rockin' in the Free World got mixed-up in presidential politics. The upshot: Young's world may be free, but Trump isn't -- at least to use Young's song in his presidential campaign.

It wasn't Young's first brush with politics. His 1970s hit "Southern Man" offered a critique of racism in the South after the desegregation of the 1960s and earned him a putdown from rock band Lynyrd Skynyrd in its own hit, "Sweet Home Alabama." 

Young also took exception to Trump's use of a picture of the two men together, which he said in a statement quote by the Los Angeles Times was "a photograph taken during a meeting when I was trying to raise funds for Pono, my online high-resolution music service."

Trump responded that Young was a "hypocrite" because he had recently asked him for money. Young, a Canadian citizen, supports Democrat Bernie Sanders for president.

5. Barry Diller

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As mentioned earlier, Diller, born in San Francisco, says he will flee the country if Trump is elected. But he's also dismayed by the content of Trump's communication with voters -- and just about everyone else.

"He has no communication strategy -- except to be what he has always been, a nasty mean person," Diller told a Bloomberg reporter. "He's a self-promoting huckster who found a vein, a vein of meanness and nastiness."

6. Carly Fiorina

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If Diller's point needs support, just check out Rolling Stone's feature on Trump, in which he comments on Carly Fiorina's appearance. "Look at that face," writer Paul Solotaroff quotes Trump as saying. "Would anyone vote for that? Can you imagine that, the face of our next president?"

The statement seems to speak for itself, but when questioned, Trump said he was referring to Fiorina's "persona" and not her looks.

When Fiorina herself was questioned about the comment, during the second Republican presidential debate, she brushed it aside. 

"I think women all over this country heard very clearly what Mr. Trump said," Fiorina noted. When asked if she'd trust Trump with the country's nuclear-weapons codes later in the debate, she was similarly oblique: "You know, I think Mr. Trump is a wonderful entertainer," Fiorina said. "He's been terrific at that business."

7. Sen. Rand Paul

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Things got nasty between Trump and Republican candidate Sen. Rand Paul during the last Republican debate. Trump said Paul shouldn't even be on the stage. Paul said Trump was -- and is -- acting like a child.

"I'm very concerned about him -- having him in charge of the nuclear weapons, because I think his response, his -- his visceral response to attack people on their appearance -- short, tall, fat, ugly -- my goodness, that happened in junior high," he said. "Are we not way above that? Would we not all be worried to have someone like that in charge of the nuclear arsenal?"

8. Megyn Kelly

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What does a woman's menstrual cycle have to do with politics? Voters all over America found out after the first Republican debate, when Trump accused Kelly of targeting him unfairly with this question: "You've called women you don't like 'fat pigs, dogs, and disgusting animals' ... how will you answer the charge from Hillary Clinton ... likely to be the Democratic nominee, that you are part of the war on women?"

The next day, Trump said of Kelly,"You could see there was blood coming out of her eyes, blood coming out of her ... wherever."

Republicans and Democrats alike were outraged by Trump's comments, but he refused to apologize. He did say, however, that he hadn't intended the comment as a reference to menstruation and told CNN that "only a sick person would even think about that."

Kelly addressed his comments in a politically correct way, saying she would "not apologize for doing good journalism."

9. Flo-Rida

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Rapper Flo Rida was supposed to perform at the Miss USA pageant in July, but cancelled his guest appearance after Trump's comments on Mexican immigrants. The Florida-born platinum-selling rapper didn't formally comment, but did say he wouldn't attend the pageant in Baton Rouge, La. 

10. Ricky Martin

On August 26, Puerto Rican singer Ricky Martin wrote a very angry op-ed for Univision. In Spanish, he said that Donald Trump's harassment of the Latino community makes his "blood boil."

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Martin was reacting to Trump's decision to eject Univision journalist Jorge Ramos from a press conference after Ramos questioned him on immigration. The singer also criticized Trump for using xenophobia as a political strategy.

11. Matt Damon

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Actor Matt Damon, who is married to an Argentine immigrant, describedDonald Trump's immigration speech as "xenophobic: and "dehumanizing."

Trump had called illegal Mexicans "rapists" and "drug traffickers" and also suggested that the 11 million immigrants in the country should be deported.

"He is talking about anyone who lives south of our border in inhuman terms. He is talking about my wife, my daughters," said Damon.

12. Carlos Slim

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While both men might be in the billionaire's club, Trump's comments killed a project with Mexican mogul Carlos Slim's television company. According to Forbes, Slim, who has a net worth of nearly $77 billion, is the second-richest man in the world, while Trump ranked 405 on the list at about $4 billion. 

Arturo Elias, Slim's son-in-law and spokesperson, said of Trump's comments about Mexicans, "His statement was totally out of line ... working with someone so closed-minded was not going to work." 

13. David Letterman

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How do you annoy the funniest man in late night television? Trump found a way.

Before David Letterman stepped down, he was tempted to ban Trump from his CBS show, Late Night with David Letterman, after his ongoing claims that President Obama wasn't born in the U.S. and a suggestion that Obama was admitted to Harvard only because of affirmative action.

"It's all fun, it's all a circus, it's all a rodeo, until it starts to smack of racism. And then it's no longer fun," Letterman said. Trump cancelled his appearance on the show.

14. Tracy Morgan

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The actor and comedian poked fun of Trump's support for the so-called birther movement during an appearance on Jon Stewart's The Daily Show in 2011. In response to Trump's reportedly sending investigators to Hawaii to look for the document, Morgan said he had located it. 

"Donald, I got [Obama's birth] certificate," he said. "It ain't in Hawaii, it's in Brooklyn. Come and get it if you want to see it."

15. Lawrence O'Donnell

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MSNBC personality Lawrence O'Donnell evidently had enough of Trump's birther talk, too. He said on his show, The Last Word With Lawrence O'Donnell in September that every time Trump talks about President Obama's birth certificate, "he lies." 

Four years earlier, in 2011, O'Donnell said that "milllions of this country's most virulent racists now feel they have someone they could vote for for president. They hope that he is every bit as racist as they are. Donald Trump may not be a racist, but he is now the racists' greatest hero. He is their front man."

During the 2012 campaign, O'Donnell said Trump was a "buffoon" and "America's biggest loser." Trump subsequently said on Twitter that O'Donnell was the "dumbest man on television."

A Trump presidency is unlikely to improve their relationship.