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Court rules Polish Constitution has primacy over EU laws
By Monika Scislowska
Will Poland's 'nuclear strike' on EU's legal order lead to 'Polexit'?
By Sandrine Amiel
Ursula von der Leyen vows to use all the EU's 'powers' in legal dispute with Poland
By Hans von der Burchard
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France and Germany say Poland must abide by EU rules
By Christian Lowe & Tangi Salaun
Poland stokes fears of leaving EU in 'Polexit'
By Adam Easton
Polish court rules EU laws incompatible with its constitution
By Jon Henley & Jennifer Rankin
Polish court rules some EU law is unconstitutional, deepening dispute
By Anna Wlodarczak-semczuk