Political scribe Ryan Lizza is taking a leave of absence from Politico after he was accused of mounting a harassment and blackmail campaign against his former fiancée, star New York magazine writer Olivia Nuzzi, his employer said Tuesday night.

Lizza, who co-authors the outlet’s popular Playbook, and Politico bosses mutually agreed that he should step away from the job while an investigation is conducted into the allegations that first came to light in a court filing Tuesday.

“POLITICO and Ryan Lizza have mutually agreed that it is in everyone’s best interest for him to step back and take a leave of absence while an investigation is conducted,” the outlet told The Post in an email.

Nuzzi claims Lizza harassed her following the couple’s breakup — and amid her tryst with Robert F. Kennedy Jr., according to CNN, which cited court docs.

Lizza denied all allegations in a statement to The Post earlier on Tuesday.

The Post has sought comment from him about the leave Tuesday night.

This is a developing story. Please check back for more updates.