Cohen had also pleaded guilty to tax and bank fraud charges and had admitted lying to Congress about a Trump property deal in Russian Federation.
Trump was as combative as ever on Twitter Thursday when he sought to distance himself from Cohen, his loyal fixer for a decade. Others know the truth.
Three days later, the Federal Bureau of Investigation raided Cohen's office, seizing records on topics including the payment to Daniels.
In court document released this week, prosecutors said that Pecker, the CEO of American Media, met with Cohen in August 2015 and offered to help Trump muzzle women who might accuse the candidate of affairs - a plan that included buying exclusive rights to their stories. He also tweeted that "Attorney-client privilege is dead!"
Since Special Counsel Robert S. Mueller accused Cohen of lying to Congress, Stephanopoulos asked him why anyone should believe him now.
In response to Trump's denials and claims his former lawyer was set on embarrassing him, Cohen said: "It is absolutely not true".
In recent weeks, Trump has shifted to asserting it was a private transactions that wasn't illegal.More news: Ariana Grande Responds to Kanye West After Being Called Out
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Cohen responded "of course" when asked if Trump was aware it was wrong to make the payments, and added the payments were to "help [Trump] and his campaign". "Whatever he did, he did on his own".
In the interview, though, Cohen denied that. "First of all, nothing at the Trump organization was ever done unless it was run through Mr. Trump". Cohen has said the president is lying about the Russia-Trump investigation. If the only actionable item that comes out of Mueller's probe is a questionable allegation of campaign-finance violations over a couple of NDAs relating to private sexual behavior, Mueller will end up in Ken Starr's shoes and everyone else will consider this a big, wasteful distraction. The fines stemmed from the campaign's failure to report a batch of contributions, totalling almost $1.9 million, on time in the final days of the campaign. He added that the objective was to "help [Trump] and his campaign".
The Wall Street Journal revealed on Thursday local time that prosecutors in NY were investigating whether Trump's inaugural committee misspent some of the record US$107 million it raised from donations.
Former chairman Bradley A. Smith, who served on the commission for five years under former President George W. Bush, argued that Cohen pled guilty to a crime that he didn't actually commit.
Cohen said it was not his intention to embarrass Trump, but that "the man doesn't tell the truth".
"I don't think there's anybody that believes that", Cohen said.
Stephanopoulos: He was trying to hide what you were doing, correct?
"Nobody except for me would be looked at like this, nobody", he said.
Stephanopoulos brought up the constant attacks that Trump has been leveling towards Cohen on social media. Cohen was guilty on many charges unrelated to me, but he plead to two campaign charges which were not criminal and of which he probably was not guilty even on a civil basis. But the key word with the Libby and Arpaio pardons is "federal": Trump had the power to pardon them for federal crimes-and he has the power to grant Paul Manafort (his former campaign manager) a presidential pardon for tax fraud, bank fraud and all the other crimes he has been convicted of.