The deputy chairman of Donald Trump's 2016 presidential campaign has been made personally responsible for the publication of the Washington trial of Roger Stone.

Rick Gates said it was much on Tuesday during Mr Stone's trial, where he said he was asked to stay abreast of the anti-secretive organization's plans, and that then-campaign chairman Paul Manafort before they were made public.

At one point in late July 2016, Gates said he overheard a phone call between Mr Trump and Mr Stone in which he believed the two were discussing WikiLeaks. Gates said he was determined by the organization's efforts to publish the stolen emails because Mr Trump said, after hanging up the phone, that "more information would be coming."

Gates noted that he did not hear what Mr Stone said on that call, which he said took place while they were driven to LaGuardia Airport from Trump Tower in New York City. But, he testified that Mr Trump indicated the new information would be coming within 30 seconds of hanging up the phone with Mr Stone.

The President, for his part, said that he is not recalling information about WikiLeaks disclosures before they were put online.

Robert Mueller's investigation last year, Mr Trump said he had no recollection of discussing the matter with Mr Stone "or anyone associated with my campaign".

WikiLeaks published numerous rushed emails in the months leading up to the 2016 election that were seen as damaging to Mr Trump's Democratic rival, Hillary Clinton.

"It was a gift," said Gates said, "In disbelief," said WikiLeaks founder Julian Assange said in a June 2016 interview that he was in possession of those emails.

Mr. Stone has been obstructing justice, witness tampering, and lying to the House Intelligence Committee during the 2016 election. He has pleaded not guilty.

In resting their case on Tuesday, Mr Stone was told to come to the House Committee in September 2017, when he said that he never spoke to any Trump campaign officials about WikiLeaks or its founder, Mr Assange.

Gates' testimony casts doubt and claims that Jason Miller and Stephen Miller had held brainstorming sessions "in part on Mr Stone's predictions" related to WikiLeaks.

Manafort, he said, had even asked him to keep in touch with Mr Stone "from time to time to see if the information is still real and viable".

Gates has also said that he is pursuing contact with Jared Kushner, Mr. Trump's his-in-law and a current White House help. Mr Kushner, he said, debriefed him on the hack into the Democratic National Committee, when the emails published by WikiLeaks were stolen.

Gates pleaded guilty last year to charges stemming from the special counsel investigation, but is yet to be sentenced. He also testified last year against Manafort in a trial sentenced to seven-year prison sentence.

Former White House strategist Steve Bannon also testified during Mr Stone's trial, saying that Mr Trump's campaign read the political operative as an "access point" to WikiLeaks during the campaign.

Mr Mueller's investigation concludes that the DNC emails were stolen by Russian state-backed hackers, as part of Moscow's efforts to boost Mr Trump's presidential run.

Reuters contributed to this report