If large urban centres are the core constituency of the liberal government of Polish Prime Minister Donald Tusk, then Sunday's presidential election first round showed him struggling against an anti-establishment pushback simmering throughout Europe.

Nationalism remains the defining matter of European politics as these elections have presented referendums on the populist movements gaining traction in the Old World.

Poland will hold the first round of a presidential election on May 18, setting the scene for a vote that will be crucial for the pro-European government's hopes of implementing its reformist agenda.

Poland’s Prime Minister Donald Tusk says Russian hackers attacked the websites of parties in his ruling coalition just two days before a presidential election.

Centrist Warsaw Mayor Rafal Trzaskowski and nationalist Karol Nawrocki will compete in a second round of the presidential election in Poland on June 1, the electoral commission said based on votes from 100% of electoral districts.

Poles vote on Sunday in a presidential election that will decide whether Warsaw follows the pro-European path set by Prime Minister Donald Tusk, or takes a step towards bringing back nationalist admirers of U.

The data from polling stations abroad are already known. Poland is awaiting the second round of the presidential election. In the first round, the Civic Coalition candidate Rafal Trzaskowski is leading with a minimal margin of 31.2%, while the second is the Law and Justice candidate Karol Nawrocki with 29.7%.