At a concert in Budapest, musicians and concertgoers express criticism of Hungarian Prime Minister Viktor Orbán's leadership.

Hungarian Prime Minister Viktor Orbán has long been accused of corruption. Sightseers now flock to his hometown as groups aim to raise awareness of what they say are the leader's excesses.

(Image credit: Rob Schmitz)

In Hungary, voters head to the polls Sunday. At stake: the future for populist Prime Minister Viktor Orbán, Europe's longest-serving leader - and an ally of Presidents Donald Trump and Vladimir Putin.

Hungary votes Sunday in a pivotal test of Viktor Orbán's "illiberal democracy," as challenger Péter Magyar taps voter frustration, with stakes for Europe, NATO and the U.S.

(Image credit: Pool/Getty Images)