US Vice President JD Vance arrived in Budapest to boost Viktor Orban's campaign ahead of an election that many opinion polls suggest the veteran nationalist leader will lose. Orban, a eurosceptic nationalist in power since 2010, is facing the toughest re-election bidof his career, with independent polls indicating his Fidesz party will ​lose Sunday's vote to centre-right ‌challenger Peter Magyar's Tisza party.