Mrs Syzdło issued a video message in which she berated critics for “appearing unjustly for Poland” and insisted the country remained democratic and committed to European values.
In the short recording, posted on her Twitter account, she said: “I would like to make it clear: Poland is a lawful and democratic state.
“Poland is solidarity and a pro-European country.
“The values underlying the European Union are important to us.
“The Polish government will defend these values.”

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The European Commission has threatened legal action against Poland over the reforms that gave the justice minister new powers which, according to Brussels, undermine the independence of the courts and violates EU rules.
The row has become increasingly bitter with EU big guns Angela Merkel and Emmanuel Macron wading in after Warsaw accused Brussels of “lacking the competence” to interfere with its domestic affairs.
Mrs Merkel said: “This is a serious issue because the requirements for cooperation within the European Union are the principles of the rule of law.
“However much I want to have very good relations with Poland we cannot simply hold our tongues and not say anything for the sake of peace and quiet.”
Mr Macron said Polish citizens “deserved better” than a government at odds with the EU’s democratic values and economic reform plans.
But he was quickly slapped down by Mrs Szydło who accused the French president of “arrogance resulting from a lack of political experience”.
Poland’s foreign ministry has brushed away the commission’s criticism in a statement which said: “The ongoing legislative measures, whose overriding aim is to reform the judicial system, are in line with European standards and respond to many years of growing social expectations in this regard, and so they groundlessly raise the commission’s doubts.”
A spokeswoman for the commission insisted there was still a case to answer.
She said: “The commission believes that there is such a threat to the rule of law in Poland.”