In Warsaw, hundreds of thousands of people demonstrated against the national-conservative PiS government. The trigger is a planned commission of inquiry in which opponents see a massive encroachment on the rule of law.

The commission, whose nine members are to be appointed by parliament, can judge whether people have succumbed to "Russian influence" – without the judiciary being involved in the investigations. According to the opposition, the new law is aimed in particular at discrediting Donald Tusk, the fiercest political opponent of PiS leader Jaroslaw Kaczynski.