Conway came on ABC'sGood Morning America on Monday and called out Comey for essentially selling his soul for a book deal instead of testifying under oath before the Senate Judiciary Committee past year.
"This guy swung an election", she told George Stephanopoulos.
In his tweet, Trump complained that Comey "drafted the Crooked Hillary exoneration long before he talked to her" and asserted that in deciding how to handle the case, Comey "based his decisions on her poll numbers".
Trump was referring to a July 2016 recommendation by Comey that Clinton not be charged in relation to her practice of using a private email server while secretary of state. So Conway is saying that Comey swung the election to Trump because he thought the "wrong person"-Hillary Clinton-would win".
Comey is carrying out a publicity campaign for his book, "A Higher Loyalty: Truth, Lies, and Leadership", set for release Tuesday. On Sunday, Comey said he felt that sending the letter was the right thing to do.
But the president also said in an interview last May that he fired Comey at least in part because of the FBI investigation Comey was then leading into Russian interference in the election and potential collusion between the Trump campaign and Russia.
After James Comey was sacked as head of the Federal Bureau of Investigation last May, many wondered when and if the former director would speak out. "He has a very deft way of making things about him".
"This is somebody who's giving a revisionist version of history", Conway told host George Stephanopoulos, who also conducted the interview of Comey.
Comey just loves "being in the proximity of power", Conway shot back.
Comey agreed with Stephanopoulos that the possibility that Trump has been compromised is "stunning", but he suggested that he views it as unlikely. "It's possible", said Comey.