Hillary Clinton blames herself for letting Bill lean towards 'looney' Monica Lewinsky

Hillary Clinton has blamed herself in part for her hubby and former US president Bill Clinton's philandering ways, new documents have revealed.

The former US Secretary of State also described Monica Lewinsky as a "narcissistic loony toon" in a private chat with her best mate, News.com.au reported.

The papers include correspondence, journal entries, memos and interviews from the mid-1970s to about 2000 belonging to Clinton's friend and confidant Diane Blair, a political-science professor who died in 2000.

After it was reported that President Clinton had Oval Office trysts with Lewinsky, Hillary angrily told Blair the young intern was a nut case — and blamed the affair on politics, the loneliness of the presidency and her own failures as a wife.

When Clinton finally admitted to the affair after repeatedly lying that he did not have sex with "that woman, Miss Lewinsky," Hillary defended her philandering spouse in a phone chat with Blair.

The former First Lady gave Clinton credit for trying to cut off the affair with Lewinsky, and insisted he did not take advantage of the young intern.