An upstart opposition party in Hungary ousted Prime Minister Viktor Orban after 16 years in a historic election that will redefine the country¡¯s relationship with the European Union, Russia and the U.S. administration of President Donald Trump.

Peter Magyar¡¯s Tisza party was headed for a supermajority in parliament that will allow it to deliver on bold promises to dismantle Orban¡¯s self-styled illiberal system. Tisza had 69% of the parliamentary mandates compared with 28% for Orban¡¯s Fidesz, according to the Election Office in Budapest on Sunday, with 90% of the votes counted.

¡°Together we dismantled the Orban system,¡± Magyar told ecstatic supporters on a stage, with the Danube River and a lit-up parliament building behind him. ¡°We will liberate Hungary and take back our country.¡±