A Breitbart editor has suggested Donald Trump Jr’s Russia emails amount to “straight up collusion”.

Raheem Kassam, the editor-in-chief of Breitbart London, is said to have made the remarks during an exchange on the far-right publication’s internal messaging application Slack.

According to a transcript of the conversation obtained by CNN, Kassam said: “So like, this is straight up collusion. Right?”

Minutes before the President’s oldest son had disclosed an email exchange on Twitter from June 2016. It showed his communication with an associate trying to arrange a meeting with a Russian lawyer claiming to have information that could damage Hillary Clinton’s campaign.

The intermediary describes the “high level and sensitive information” as “part of Russia and it’s government’s support for Mr Trump” – following months of denials by the Kremlin and White House over alleged interference in the election.

“I love it,” the younger Trump responded, setting up a meeting that later took place at Trump Tower in New York, on 9 June last year.

Iran's 'Trumpism' contest Show all 10 1 /10 Iran's 'Trumpism' contest Iran's 'Trumpism' contest A picture taken on July 3, 2017 shows a cartoon of US President Donald J. Trump and First Lady Melania Trump on display at an exhibition of the Islamic Republic's 2017 International Trumpism cartoon and caricature contest, in the capital Tehran. / AFP PHOTO / ATTA KENARE (Photo credit should read ATTA KENARE/AFP/Getty Images) AFP/Getty Images Iran's 'Trumpism' contest An Iranian woman looks at cartoons of US President Donald J. Trump at an exhibition of the Islamic Republic's 2017 International Trumpism cartoon and caricature contest, in the capital Tehran on July 3, 2017. / AFP PHOTO / ATTA KENARE (Photo credit should read ATTA KENARE/AFP/Getty Images) AFP/Getty Images Iran's 'Trumpism' contest An Iranian woman looks at cartoons of US President Donald J. Trump at an exhibition of the Islamic Republic's 2017 International Trumpism cartoon and caricature contest, in the capital Tehran on July 3, 2017. / AFP PHOTO / ATTA KENARE (Photo credit should read ATTA KENARE/AFP/Getty Images) AFP/Getty Images Iran's 'Trumpism' contest Iranian cartoonist Hadi Asadi poses for a picture with a trophy and an award next to cartoons of US President Donald J. Trump, at an exhibition of the Islamic Republic's 2017 International Trumpism cartoon and caricature contest, in the capital Tehran on July 3, 2017. / AFP PHOTO / ATTA KENARE (Photo credit should read ATTA KENARE/AFP/Getty Images) AFP/Getty Images Iran's 'Trumpism' contest Iranians look at cartoons of US President Donald J. Trump at an exhibition of the Islamic Republic's 2017 International Trumpism cartoon and caricature contest, in the capital Tehran on July 3, 2017. / AFP PHOTO / ATTA KENARE (Photo credit should read ATTA KENARE/AFP/Getty Images) AFP/Getty Images Iran's 'Trumpism' contest An Iranian woman looks at cartoons of US President Donald J. Trump at an exhibition of the Islamic Republic's 2017 International Trumpism cartoon and caricature contest, in the capital Tehran on July 3, 2017. / AFP PHOTO / ATTA KENARE (Photo credit should read ATTA KENARE/AFP/Getty Images) AFP/Getty Images Iran's 'Trumpism' contest Iranian reformist cleric Mahmoud Doaei looks at cartoons of US President Donald J. Trump at an exhibition of the Islamic Republic's 2017 International Trumpism cartoon and caricature contest, in the capital Tehran on July 3, 2017. / AFP PHOTO / ATTA KENARE (Photo credit should read ATTA KENARE/AFP/Getty Images) AFP/Getty Images Iran's 'Trumpism' contest An Iranian man looks at cartoons of US President Donald J. Trump at an exhibition of the Islamic Republic's 2017 International Trumpism cartoon and caricature contest, in the capital Tehran on July 3, 2017. / AFP PHOTO / ATTA KENARE (Photo credit should read ATTA KENARE/AFP/Getty Images) AFP/Getty Images Iran's 'Trumpism' contest An Iranian woman looks at cartoons of US President Donald J. Trump at an exhibition of the Islamic Republic's 2017 International Trumpism cartoon and caricature contest, in the capital Tehran on July 3, 2017. / AFP PHOTO / ATTA KENARE (Photo credit should read ATTA KENARE/AFP/Getty Images) AFP/Getty Images Iran's 'Trumpism' contest Iranian reformist cleric Mahmoud Doaei looks at cartoons of US President Donald J. Trump at an exhibition of the Islamic Republic's 2017 International Trumpism cartoon and caricature contest, in the capital Tehran on July 3, 2017. / AFP PHOTO / ATTA KENARE (Photo credit should read ATTA KENARE/AFP/Getty Images) AFP/Getty Images

Kassam, a former chief advisor to Nigel Farage, told The Independent his private remark was taken out of context.

“The slack message was not a statement that I was making. It was taken out of context by Oliver Darcy [the CNN journalist]."

He added: "If I were to say the comment to you over the phone, it would be in a sarcastic tone posed as a question, but he wanted to read into it what he could.”

Kassam challenged Ukip's November 2016 leadership election before dropping out of the race at the end of October.

His campaign slogan "make Ukip great again" took inspiration from President Trump. Kassam has previously labelled his movement as "Faragist" and joked that he was the ”Faragest of the Faragists“.

Kassam joined Breitbart as managing editor when conservative columnist James Delingpole set up the British post of the conservative publication in 2014.

Steve Bannon, White House Chief Strategist and the former executive chairman of the site, declared Breitbart "the platform for the alt-right” - a political movement which has been accused of racism, antisemitism and misogyny - after taking the reins around four years ago.