Headed for Polxit? EU says a recent ruling from the country’s constitutional court challenging the supremacy of EU laws is a threat to the bloc’s foundations and won’t be left unanswered.

The European Union’s top official locked horns Tuesday with Poland’s prime minister, arguing that a recent ruling from the country’s constitutional court challenging the supremacy of EU laws is a threat to the bloc’s foundations and won’t be left unanswered, AP reports.

European Commission president Ursula von der Leyen and Mateusz Morawiecki laid bare their differences of opinion on rule-of-law principles during a heated debate with EU lawmakers.

Von der Leyen accused Morawiecki of trying to run away and escape the debate on the primacy of European law. He in turn insisted that Poles are in favor of the “power of the rule of law” and “don’t believe in blackmail or paternalistic attitudes” toward their country.

Relations between Poland and the EU have been rocky for years and reached a new low earlier this month after the tribunal ruled that Polish laws take precedence over those of the 27-nation bloc — which Poland joined in 2004 — escalating lingering tensions over democratic standards between the country’s right-wing nationalist government and Brussels institutions.

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