Vanity Fair's appointment of political reporter Olivia Nuzzi has backfired after her ex-fiance's claim she had another "affair" with a presidential candidate caused huge "embarrassment" within the title.

RadarOnline.com can reveal Nuzzi's signing was set to signal a "new era" at the publication which bosses hoped to kickstart with the first excerpt her new memoir American Canto , detailing her secret romantic relationship with Robert F. Kennedy Jr. Article continues below advertisement

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However, Nuzzi’s former fiancé Ryan Lizza’s allegation she also had an "affair" with another politician she had covered, former South Carolina Gov. Mark Sanford whom she profile

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