A vote seen as a test of the power of populist nationalism in Europe was too close to call, with exit polls putting the two contenders neck and neck.

Conservative Karol Nawrocki narrowly won Poland's presidential runoff election, beating Warsaw's liberal mayor, according to the final vote count. Nawrocki was backed by President Trump.

A nationalist candidate backed by Donald Trump was on course to win Poland’s presidential election, defeating the centrist mayor of Warsaw in a blow to the country’s pro-European Union government.