The former FBI director said Clinton's "respect for institutions" suggested she would not have fired him as Trump did.
"I thought about the Ramsey Rapist every night before I went to bed for five years," the former FBI director said.
Comey wants Republicans to think about how they would answer their grandchildren in the future if they ask about the events of today.
Representative Claudia Tenney was one of 11 Republicans to sign a petition calling on Hillary Clinton, James Comey and others to be investigated.
Blaming a letter rather than her supercilious nature, malleable positions, or terrible campaign strategy continues to feed the perception that the election process was somehow compromised.
"I don't crave to be known," Comey said.
President Donald Trump told former FBI Director James Comey that he had "serious reservations" about the judgment of his former national security adviser Michael Flynn, according to leaked memos obtained by the Associated Press.
Comey spoke with CNN's Jake Tapper following the release of his book.
Newsweek had previously reported that he planned to write a newspaper op-ed.
Now that he is a private citizen, Comey can address the still murky connections between the New York FBI office, elements of the New York Police Department and Donald Trump.
James Comey's attack on the president couldn't match Stormy Daniels's recent interview but did at least have one notable viewer.
Ninety-one-year-old John Dingell said he hadn't planned on buying a copy.
The former FBI director said sending the letter had been the right thing to do.