The petition was backed by 255 of 318 lawmakers on Monday, surpassing the one-third threshold required.
With her ally-turned-enemy Marcos limited by the constitution to a single term in office, Duterte-Carpio is the clear favourite to succeed him in 2028, but the impeachment could derail her bid.
She denies wrongdoing, and her legal team has described the impeachment effort as defective and a “fishing expedition”.
The Senate must convene a trial with its members as jurors. Duterte-Carpio faces removal from office and a ban from politics if convicted.
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