So why did Hillary forgive Bill? A new report claims to have the answer, along with other inside info on her reaction to his affair in the mid-90s.
The report is coming out of conservative website The Washington Free Beacon. According to CNN, the outlet says it's quoting the documents of Diane Blair, a deceased political science professor who was a close friend of Hillary's.
"[The affair] was a lapse, but [Hillary] says to his credit he tried to break it off, tried to pull away, tried to manage someone who was clearly a 'narcissistic loony toon'; but it was beyond control."
According to the Free Beacon, these quotes are coming from Blair's papers that were donated to the University of Arkansas in 2010 by her husband. She died in 2000.
Blair apparently said Hillary thought her husband's sex with Monica Lewinsky didn't have "any real meaning," and that she felt the former president might have had the affair due to the stress of their personal losses - her father and his mother, along with their friend Vince Foster, died after he took office.
The Free Beacon provides a lengthy assessment of the documents, dubbing Hillary Clinton both a "devoted mother" and a "cutthroat strategist."
Of course, the report comes as rumors build that Clinton will run for president in 2016 -- and as headlines build as to whether Bill Clinton and his past will help or hurt his wife's potential candidacy.
Click through the slideshow below for a look back at the relationship between Bill Clinton and Monica Lewinsky.