Polish Prime Minister Mateusz Morawiecki has accused the EU of blackmail in a heated debate with European Commission Chief Ursula von der Leyen over the rule of law.
The clash in the European Parliament follows a top Polish court ruling that rejected key parts of EU law.
Von der Leyen said she would act to prevent Poland undermining EU values.
Morawiecki in his response, rejected the language of threats and accused the EU of overstepping its powers.