Arnold tweeted the photo with Cohen and the caption, "I love NY".
Arnold is spearheading the show "The Hunt for the Trump Tapes" where the actor, who has been vocally critical of the President, will be filmed trying to track down damaging tapes that are rumoured to exist involving Trump, reports CNN.
President Donald Trump's embattled personal attorney, Michael Cohen, retweeted a photo of himself with comedian Tom Arnold - who happens to be working on a show with Vice that features him hunting for unflattering video of Trump.
Although Arnold did not say Cohen was actually planning to give him compromising recordings of his former client, Donald Trump, he said that the lawyer "has everything", while admitting to NBC News that it was "indiscreet" of him to tweet the photo.
Arnold, who was once a contestant on Trump's show, "Celebrity Apprentice", claimed that aside from whatever dirt Cohen has, he has access to other recordings in which Trump allegedly uses the N-Word and other foul language toward his children. "Michael Cohen didn't say Me & him were teaming up to take down Donald Trump!", he tweeted.
Cohen's attorney, Guy Petrillo, did not immediately respond to an email seeking comment Friday.
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The 59-year-old also claimed to be meeting with former Trump lawyer Michael Cohen, but awkwardly avoided giving any details about what they may be working on together.
"It's on! I hope [Trump] sees the picture of me and Michael Cohen and it haunts his dreams", Arnold said.
Yet, according to Cohen, that is not the case - at all.
Vice said last month that Arnold would "draw on his extensive" connections in the Hollywood scene to gather evidence to impeach the president. "We're taking Trump down together, ' and he's so exhausted he's like, 'OK, ' and his wife is like, 'OK, (expletive) Trump,"' Arnold told NBC. Pointing to a picture of himself with Arnold that was widely circulated on Friday, Cohen said, "this was a chance, public encounter in the hotel lobby where he asked for a selfie".