Poland and the U.S. are close allies, and there are 10,000 U.S. troops stationed in Poland, but Tusk and his partners in the past have been critical of Trump. Nawrocki, however, has a worldview closely aligned with Trump and his Make America Great Again ethos.

The country’s government is centrist, with deep ties to Brussels. Its new president is a Trump-backed nationalist. That reflects a broader struggle.

Karol Nawrocki, a right-wing nationalist, flipped exit poll results and defeated Warsaw Mayor Rafal Trzaskowski.

Poland's prime minister says he will seek a vote of confidence in parliament after his ally loses presidential election.

The close election result shows Poland is still bitterly divided on social and cultural issues. Not so much on economic policy.

Relations between Berlin and Warsaw could suffer after conservative Karol Nawrocki won Poland's presidential election, German foreign policy experts warned on Monday. Lawmaker Paul Ziemiak said cooperation between Germany and Poland is "fundamentally important" for Europe.

Poland is set to hold a presidential runoff election on Sunday between two candidates offering starkly different visions for the country's future.