WARSAW (Reuters) – Polish President Andrzej Duda on Sunday criticized the European Commission for blocking EU funds in what he said was “an attempt to force Poland to change” its government, adding he was open to negotiations over changes in the justice system. Poland’s last government led by the nationalist Law and Justice (PiS) party was embroiled in a dispute with the European Union over Warsaw’s court reforms and the rule of law, resulting in billions of EU funds for Poland being frozen. The new pro-EU government has pledged to regain access to the money by restoring the rule of law, but i…