This combination of photos shows candidates in Poland's presidential election, Warsaw Mayor Rafal Trzaskowski, right, and Poland's President Andrzej Duda. The two candidates are heading into a razor's-edge presidential runoff election Sunday, July 12, 2020, that is seen as an important test of populism in Europe after a campaign that exacerbated a conservative-liberal divide in the country. (AP Photo/Czarek Sokolowski)

Polish President Andrzej Duda speaks to supporters at a presidential election campaign rally in Lomza, Poland, on Tuesday July 7, 2020. Two bitter rivals are heading into a razor's-edge presidential runoff election Sunday in Poland that is seen as an important test of populism in Europe after a campaign that exacerbated a conservative-liberal divide in the country. (AP Photo/Czarek Sokolowski)

FILE - In this June 28, 2020, file photo, Presidential candidate Rafal Trzaskowski casts his vote during presidential election in Warsaw, Poland. Trzaskowski and President Andrzej Duda are heading into a tight presidential runoff that is seen as an important test for populism in Europe. The Sunday, July 12 election comes after a bitter campaign that has exacerbated a conservative-liberal divide in the country. (AP Photo/Petr David Josek, File)

A candidate in Poland's July 12 presidential election runoff, Warsaw Mayor Rafał Trzaskowski with wife Małgorzata celebrate during a rally presidential election runoff, in Częstochowa, Poland, Saturday, July 4, 2020. Surveys give almost equal chances in the vote to Trzaskowski and to incumbent president, Andrzej Duda, who is seeking reelection.(AP Photo/Czarek Sokolowski)

A man walks his dogs outside a home with campaign posters showing two candidates in Poland's weekend presidential election, Polish President Andrzej Duda and his challenger, Warsaw Mayor Rafal Trzaskowski, in Tykocin, Poland, on Tuesday July 7, 2020. Two bitter rivals are heading into a razor's-edge presidential runoff election Sunday in Poland that is seen as an important test of populism in Europe after a campaign that exacerbated a conservative-liberal divide in the country. (AP Photo/Czarek Sokolowski)

FILE - In this July 4, 2020, file photo, supporters hold banners of Presidential Candidate and Warsaw Mayor Rafal Trzaskowski during a rally in Czestochowa, Poland. Trzaskowski and President Andrzej Duda are heading into a tight presidential runoff that is seen as an important test for populism in Europe. The Sunday, July 12 election comes after a bitter campaign that has exacerbated a conservative-liberal divide in the country. (AP Photo/Czarek Sokolowski, File)

FILE - In this June 28, 2020, file photo, a candidate in Poland's presidential election, Warsaw Mayor Rafal Trzaskowski, front, reacts to the exit poll after voting closed, in Warsaw, Poland. Trzaskowski and President Andrzej Duda are heading into a tight presidential runoff that is seen as an important test for populism in Europe. The Sunday, July 12 election comes after a bitter campaign that has exacerbated a conservative-liberal divide in the country. (AP Photo/Czarek Sokolowski, File)

FILE - In this June 28, 2020, file photo, President Andrzej Duda and his wife Agata Kornhauser-Duda wave to supporters shortly after voting ended in the presidential election in Lowicz, Poland. Duda and Warsaw Mayor Rafal Trzaskowski are heading into a tight presidential runoff that is seen as an important test for populism in Europe. The Sunday, July 12 election comes after a bitter campaign that has exacerbated a conservative-liberal divide in the country. (AP Photo/Petr David Josek, File)

FILE - In this June 28, 2020, file photo, Presidential candidate Rafal Trzaskowski with his wife Malgorzata addresses the media after casting his vote during presidential election in Warsaw, Poland. Trzaskowski and President Andrzej Duda are heading into a tight presidential runoff that is seen as an important test for populism in Europe. The Sunday, July 12 election comes after a bitter campaign that has exacerbated a conservative-liberal divide in the country. (AP Photo/Petr David Josek, File)

FILE - In this June 28, 2020, file photo, President Andrzej Duda addressees supporters shortly after voting ended in the presidential election in Lowicz, Poland. Duda and Warsaw Mayor Rafal Trzaskowski are heading into a tight presidential runoff that is seen as an important test for populism in Europe. The Sunday, July 12 election comes after a bitter campaign that has exacerbated a conservative-liberal divide in the country. (AP Photo/Petr David Josek, File)

FILE - In this June 28, 2020, file photo, Poland's President Andrzej Duda and his wife Agata Kornhauser-Duda cast their vote during presidential election in Krakow, Poland. Duda and Warsaw Mayor Rafal Trzaskowski are heading into a tight presidential runoff that is seen as an important test for populism in Europe. The Sunday, July 12 election comes after a bitter campaign that has exacerbated a conservative-liberal divide in the country. (AP Photo/Beata Zawrzal, File)

Supporters of Polish President Andrzej Duda hold up banners at a presidential election campaign rally in Tykocin, Poland, Tuesday, July 7, 2020. Two bitter rivals are heading into a razor's-edge presidential runoff election Sunday in Poland that is seen as an important test of populism in Europe after a campaign that exacerbated a conservative-liberal divide in the country. (AP Photo/Czarek Sokolowski)