This is the best summary I could come up with:

Opinion polls suggest the nationalist Law and Justice (PiS) government could win the vote but may struggle to form a majority amid discontent among some over rising living costs and concern over an erosion of democratic checks and balances.

This is a sign of Poland’s rebirth," PO leader Donald Tusk told crowds gathered in a central Warsaw square, many people waving Polish and EU flags.

Tusk, a former European Council president, has said PiS could aim to take Poland out of the EU, something the party denies, and has framed the election as crucial for minority and women’s rights.

PiS, in power since 2015, has campaigned on a pledge to keep migrants out of Poland, saying that was key for national security, and to continue funnelling money towards families and the elderly.

Public broadcaster TVP, which independent media observers say has become a government mouthpiece under PiS rule, quoted police saying about 100,000 people had joined Sunday’s march.

PiS denies western criticism that it has subverted democratic norms and says its reforms of the judiciary are aimed at making the country fairer and free of vestiges of communism, while its changes to public media rid it of foreign influence.

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