People celebrate following partial results on the day of the Hungarian Parliamentary election in Budapest, Hungary, April 13, 2026. REUTERS/Bernadett Szabo “Tisza is flooding.” The slogan adopted by Péter Magyar’s party ahead of Hungary’s parliamentary elections—a play on the party’s rising polls and shared name with Hungary’s second-longest river—came true on Sunday with an electoral tsunami that swept out Hungarian Prime Minister Viktor Orbán and his Fidesz party after sixt