Since winning power back from the hands of his populist rivals a year and a half ago, Poland’s Prime Minister Donald Tusk has faced one very stubborn roadblock to his plans: the country’s president.

Poland’s presidential election will determine whether the country can restore the rule of law and remain a reliable partner in the European Union after nearly a decade of divisive right-wing populist rule.

The Polish government's approval ratings are down because the president is blocking its reform plans. The outcome of Sunday's presidential election will determine whether the stalemate continues or ends.