Polish Ruling on Primacy of EU Law May Worsen Row With Brussels

Polish Ruling on Primacy of EU Law May Worsen Row With Brussels
The Supreme Court in Warsaw, Poland, on Sept. 13, 2018. Kacper Pempel/Reuters
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WARSAW—A top Polish court will rule on Tuesday on whether the country’s constitution or European Union treaties take precedence, the first of two rulings this week that could bring Warsaw’s conflict with Brussels over the rule of law to a head.

Warsaw aims to hit back at what it says is unjustified interference in its internal affairs by the European Commission, but critics say that questioning the primacy of EU law undermines the functioning of the bloc and jeopardises Poland’s continued membership.