When PPK resigned on 23 March 2017, the presidency was passed to civil engineer Martin Vizcarra, with Fujimori welcoming him and wished for his "success" through a tweet the same day. Nevertheless, she heavily criticized Vizcarra's 2018 Peruvian constitutional referendum since included on the ballot was whether citizens supported the re-election of congressmen and the return of a bicameral legislature. She claimed that the ballot items "are evidence of centrist populism", asked the president to "stop seeing congress members as your enemies", and was empowered to make as the parliamentary majority leader to attempt to defeat the measures through the referendum.