He pleaded guilty in October 2017 to lying to federal investigators about his contacts with Joseph Mifsud, a London-based professor who supposedly told him in 2016 that Russian Federation had damaging information on Hillary Clinton, Mr. Trump's Democratic opponent.
"That's the biggest regret I actually have out of this whole situation", he told the panelists, "was that instead of, you know, allegedly gossiping about it with the Australian Downer, which I have no recollection of doing, and I remember speaking about it with the Greek foreign minister, instead of gossiping and doing what I was doing, I should have gone to the Federal Bureau of Investigation or the US embassy".
Papadopoulos, attempting to clear up a "misunderstanding", added in the interview with ABC that Mifsud did not tell him about anything about the Democratic National Committee (DNC) or John Podesta during that discussion.
Papadopoulos went on to claim Downer had "wanted to meet under incredibly suspicious circumstances", and even referenced the infamous photo of Downer wearing women's stockings, as he tried to cast doubt on the politician's motivations.
When asked what he had to say about Sessions' statement, Papadopoulos said his memory of the entire saga was very different from the attorney general's.
Trump and his campaign have repeatedly denied any collusion during the campaign.
Papadopoulos finally said that he was "remorseful" for how things had turned out, but claimed that he had never done anything without the knowledge of senior Trump campaign officials.More news: ‘Extremely dangerous’ Hurricane Florence is now packing winds of 220 km/h
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While talking to the FBI, Papadopoulos lied about the timing and extent of his contacts with Mifsud and two Russians that were introduced to him by Mifsud.
Mifsud was last seen publicly at a speech to a Roman university in 2017, according to CNN.
Abby Hunstsman pressed Papadopoulos on the believability of his story, noting people find it unusual he "wouldn't even try and find a way to contact the campaign to let them know that someone had Clinton's emails".
Papadopoulos appeared with his wife, Simona Mangiante Papadopoulos, who has been campaigning on his behalf.
Downer also is personally linked to Clinton, as he once arranged a $25 million donation to the Clinton Foundation from the Australian government for AIDS prevention and education efforts. It came just over two weeks after two former top Trump aides were convicted of felony crimes in cases that grew out of the probe. But he may not be entirely finished with the investigations that led him to prison.
But asked if he thinks the Mueller investigation will ultimate demonstrate collusion between Trump advisers and the Russians, Papadopoulos replied: "All I can say is that my testimony might have helped move something towards that, but I have no idea".