MANILA — Taguig Rep. Pia Cayetano, who is seeking a Senate comeback, voted Monday morning in Taguig City, where three of her relatives are also running for key local positions.

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The deputy speaker cast her ballot in precinct 1214A at the Kapitan Eddie T. Reyes Memorial Elementary School (KERMES) in Barangay Pinagsama, Taguig City.

She was joined by her eldest daughter Maxine Cayetano Sebastian.

Cayetano ranked 3rd in the last pre-election survey conducted by Pulse Asia.

Cayetano is running under the Nacionalista Party but her candidacy was also backed by President Rodrigo Duterte's PDP-Laban as well as Davao City Mayor Sara Duterte-Carpio's regional party Hugpong ng Pagbabago.

She was likewise included in the "bloc voting" list of influential religious group Iglesia ni Cristo.

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In 2004, Cayetano became the youngest woman elected in the history of the Senate. She was reelected in 2010.

In 2016, she ran and won a seat as representative of Taguig City's second district.

In this year's midterm elections, her brother, former senator and top diplomat Alan Peter Cayetano, and his wife Laarni are running as representatives of Taguig's two districts, while her other sibling Lino Cayetano is seeking the city's mayoral post.