Philippine lawmakers have moved two impeachment complaints against Vice-President Sara Duterte-Carpio a step closer to formal proceedings, advancing a case that could ultimately threaten her political future as a potential contender for the presidency in 2028.

The drawn-out process also carries political risks for both camps, with some lawmakers arguing that a failed Senate conviction could ultimately strengthen Duterte-Carpio ahead of the 2028 race.

The House of Representatives’ justice...