A hard-right critic of NATO who has praised Russia is set to face a centre-right opposition leader in a presidential election run-off in Romania that could undermine its pro-Western stance after a shock outcome in the first-round vote.

Romania, which shares a 650-kilometer (400-mile) border with Ukraine, has gained strategic importance since Russia invaded its neighbour in 2022. Despite his growing domestic support, Simion’s rhetoric is reason for alarm for Nato allies.

Calin Georgescu, who has stunned Romania and its European allies by leading the first round of the eastern European country's presidential election, is a far-right, self-styled outsider critical of NATO and of Ukrainian President Volodymyr Zelenskiy.

Calin Georgescu, a prominent critic of NATO and Romania's support for Ukraine, has taken the lead in the presidential election.

The pro-Russian nationalist candidate Calin Georgescu had racked up a definitive 350,000 vote lead in an upset in Romania's presidential election as counting in the first round wound to a finish Monday.

In Romania’s presidential election, ultra-nationalist candidate Călin Georgescu is leading, with current Prime Minister Marcel Ciolacu in second place, according to the Central Electoral Bureau of Romania.