Speaking to reporters before returning to Warsaw from the European Political Community summit in Yerevan, Armenia, Tusk said President Nawrocki appeared less interested in constitutional order than in changing the system "so that he has more to say".
He added that the current framework, broadly speaking, "serves Polish affairs well".
The prime minister said he would be willing to take part in a "serious conversation" about the constitution, but drew a sharp distinction between that and the president's council.
Tusk argued that the current constitution already "clearly enough sets out" who holds which responsibilities, and called on the president and the opposition to respect it before "tinkering with a new one".
He also noted that a constitutional majority for the president's proposals does not exist and is unlikely to emerge any time soon, suggesting the initiative amounted to little more than a "political game" that risked adding to instability at a time when Poland needed calm.
Referring to the Constitution of 3 May – one of the world's earliest modern supreme laws – and the Targowica Confederation that helped bring about its collapse, Tusk warned that fine-sounding slogans were no substitute for genuine commitment to the rule of law.
The council, established by President Nawrocki on Sunday, includes former Constitutional Tribunal president Julia Przyłębska – a figure Tusk said he would find it "rather grotesque" to debate constitutional order with – alongside legal scholars and former senior officials.
The president has said he aims to have a draft constitution ready by 2030.
Nawrocki first raised the need for a new constitution in his inaugural address in August 2025, when he also pledged to be a guardian of the existing one.
He argued that nearly 30 years on, Poland faces a fundamentally different social and geopolitical situation, and that the intervening years had seen numerous disputes over the division of powers.
Poland's current constitution was adopted in 1997, with next year marking its 30th anniversary.
(ał)
Source: PAP