Filed an election protest for alleged “massive fraud and irregularities” against the proclamation of Leila De Lima

Filed an election protest for alleged “massive fraud and irregularities” against the proclamation of Leila De Lima as the 12th winning senatorial candidate in the 2016 polls, which he later withdrew and the Senate Electoral Tribunal dismissed; results of the vote recount showed De Lima won over Tolentino, who placed 13th