Poland, a leading example of economic growth and increased military spending in Europe, will vote in a presidential runoff Sunday in a race that remains too close to call.

Voting was underway in Poland's knife-edge presidential election on Sunday, which will determine whether the largest country in the European Union's eastern wing cements its place in the bloc's mainstream or turns towards MAGA-style nationalism.

Voters in Poland have been casting their ballots in the country's presidential election - with the outcome believed to be on a knife-edge.