Hungarians are voting in what is seen as Europe's most significant election this year, potentially unseat populist Prime Minister Viktor Orbán, who has been in power for 16 years. The election, which began at 6 a.m. local time, is being watched globally due to Orbán's role in the European Union as a key figure in far-right populist politics. He has been accused of using his veto power to influence key decisions from the EU, including blocking a 90-billion euro ($104 billion) EU loan to Ukraine. His top challenger, Péter Magyar, has been campaigning on issues such as public health care and transportation sectors and rampant government corruption. Despite these challenges, there are concerns that internal fraud could affect the result.