Donald Trump is a 'vulgar, demented, pig demon' who only appeals to 'emasculated' middle-aged men, the former innovation adviser to Hillary Clinton has said.
Alec Ross, who was senior adviser for innovation to Clinton during her term as Secretary of State, was speaking at The Hay Festival in Wales about the industries of the future.
Ross, said that the most open countries would have the greatest success in the coming decades because the biggest emerging markets were big data and genomics. But he warned that America could become a more closed society if Donald Trump was elected president.
"We're having this struggle very publicly in the United States right now where a vulgar, demented, pig demon named Donald Trump is trying to make the United States a more closed society.
"We'll be saying, no more brown people, no more Muslims, let's get women back in the kitchen. Let's make America great again.
"What he's talking about is taking emasculated men in their forties, fifties and sixties who are not living the life they hoped for in their teens and twenties and saying, 'you know what? there are people to blame for this. And we're going to build a wall and we're going make America great again.
"At the core of that is the struggle between being an open society and a closed society.
And so if you want to know where the trillions of dollars of wealth creation that are going to come with the commercialisation of genomics, and the creation of big data companies, and the AI machine learning companies and all of the industries of the future my overarching line here is it's going to be the most open societies.
"Open societies means that upward economic and social mobility is not constrained to elites, it means that religious and cultural norms are not set by central authorities and it means that it is wildly rights respecting, in terms of the rights of women, religious minorities, racial minorities and ethic minorities.
"The industries of the future will be overwhelmingly concentrated in the most open societies."
The American author Lionel Shriver, who was publicising her new book The Mandibles also spoke about her fears for the US if Trump was elected as president in her home country, and said the Republican candidate was such a 'buffoon' that he would not make a credible character in a novel.
"I don't understand this. If you were to write Donald Trump as a serious nominee as a character in a novel he would not be persuasive, nobody would buy it. This guy is too much a buffoon, it would come across as farce, and bad farce it would not make good reading.
"He never completes a sentence grammatically. Honestly he bothers me as much as a pedant about English as anything else.
"He is so broad that he is fictionally incredible. He would never work on the page.
"We have never thrown up candidates who were so unqualified and uncouth and I am afraid that it is a sign that the American electorate no longer taking the country seriously, it's no longer regarding the United States as a country that leads the world, that has responsibility that it is a beacon of freedom, no we're just a rabble and we can elect whoever we like.
"It's like crawling into the TV and being on the wrong side of the set. And I find this very disheartening in terms of the state of the nation.
"It's not just the bigotry, it's the not feeling a sense of responsibility to your country or the world. There is something nihilistic about a willingness to put someone like that up for the presidency."