New Delhi, April 12 -- In what was considered to be Europe's most consequential election this year, Hungarians on Sunday cast their votes, marking a record turnout in an election that is likely to unseat populist Prime Minister Viktor Orban, a close ally of US President Donald Trump.

According to an AP report, Sunday's election marks a crucial moment for Orban, the European Union's longest-serving leader and one of its prominent antagonists. He has undergone a striking political evolution, from a liberal, anti-Soviet firebrand in his early career to the Russia-friendly nationalist now admired by the global far right.

Polling opened at 6 a.m. and closed at 7 p.m., with initial results expected Sunday night. Orban and his top challenger, ...