Other members of the party have previously nominated incumbent President Rodrigo Duterte as vice president and his close ally, Senator Christopher "Bong" Go, for the presidency.
Pacquiao is a big star in the boxing world.
He is the only boxer to have won twelve championship belts in eight different weight classes.
CLIP: Here, Trump challenges President Biden to a boxing match
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Trump challenges Biden to a boxing match.
Photo: Bildbyrån.