Donald Tusk called the vote to seek endorsement of his government after a political opponent won the presidency.

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Efforts in the Polish region of Silesia to honor Ernest Wilimowski, a local star who played for the national teams of both Poland and Nazi Germany, are raising tricky questions about national loyalty and betrayal.

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Here’s what to know about Poland’s presidential runoff, which sets up a showdown between the governing party and resurgent nationalists.

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