- John McCain sent an emissary to meet the former British spy in December
- Mr McCain handed over the dossier to FBI Director James Comey in December
- However, the FBI already had a copy of the explosive dossier since August
- Both the Kremlin and Donald Trump have strongly denied the allegations
Leading Republican senator John McCain handed over an explosive dossier on Donald Trump's alleged links to the FBI in December.
The alarming report contains a string of lurid allegations which were supposedly made by Russian agents in a bid to control Trump.
Senator McCain, who was branded as 'not a war hero because he was captured' by Trump, sent an emissary to meet the former MI6 agent to collect a copy of the dossier.
Donald Trump, pictured, has denied allegations contained in an explosive dossier compiled by a former British MI6 agent claiming on Twitter he is being subjected to a 'political witch hunt'
The dossier claims Russian authorities filmed Trump in a Moscow hotel room with two prostitutes who 'defiled a bed' which had previously been used by President Barack Obama
McCain was shot down over Hanoi, North Vietnam while on his 23rd mission. He suffered two broken arms and a broken leg and was taken to the Hanoi Hilton prison.
The naval aviator was repeatedly offered an early release by Vietnamese authorities who wanted a propaganda victory by allowing the son of a high-ranking naval officer special treatment.
Despite constant torture, McCain remained in prison, suffering permanent damage until his eventual release in March 1973.
He was awarded the Silver Star, Bronze Star, Purple Heart and the Distinguished Flying Cross.
McCain only withdrew his support of Trump in August 2016 after shocking audio emerged of the former reality TV star talking to Billy Bush using the phrase 'grab her by the p****'.
The Arizona senator said at the time: '"Donald Trumps behavior... concluding with the disclosure of his demeaning comments about women and his boasts about sexual assaults, make it impossible to continue to offer even conditional support for his candidacy.'
US intelligence agencies have claimed that Russian spies hacked the Democratic National Committee and leaked damaging emails designed to undermine Hillary Clinton's campaign for president.
The new information, which has not been independently verified, claims that Russian officials also gathered highly damaging information on Trump, but only released the details attacking Clinton through the WikiLeaks website.
The Kremlin has denied all of the allegations, while Trump tweeted: 'FAKE NEWS - A TOTAL POLITICAL WITCH HUNT'.
However, McCain was so concerned about the information contained within the 35-page dossier, which included allegations that Trump had hired prostitutes in Moscow to urinate on a bed that had previously been used by US President Barack Obama and his wife Michelle, that he passed the information onto the FBI
CNN reported that intelligence chiefs had presented Trump with a two-page summary of the dossier late last week following a briefing with President Obama.
Trump has consistently denied that Russian intelligence agencies had launched a massive cyber attack ahead of last November's election.
The dossier which McCain passed to FBI Director James Comey was compiled by the former MI6 man who is believed to have excellent contacts within Russia.
The memos describe sex videos involving prostitutes filmed during a 2013 visit by Trump to a luxury Moscow hotel, supposedly as a potential means for blackmail.
They also suggest Russian officials proposed lucrative deals in order to win influence over the Republican real estate magnate.
The former MI6 man had been hired to conduct 'opposition research' on the Trump campaign.
However, the former spy was so alarmed at some of the information he had uncovered, he passed a copy of his report to the FBI in August, more than two months before the election.
Russia denied the claims, with President Vladimir Putin's spokesman Dmitry Peskov telling journalists: 'The Kremlin does not have compromising information on Trump.'
The Kremlin spokesman called the dossier a 'total fake' and 'an obvious attempt to harm our bilateral relations'.
Earlier, the Kremlin had denied hacking the Democratic National Committee and leaking information to deliberately weaken Hillary Clinton's campaign.
Donald Trump's transition team has repeatedly denied allegations that it had received any help from Moscow.
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