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.

Poland is heading to the polls in a high-stakes presidential race that could redfine its political landscape. Sunday’s outcome will test the strength of Poland’s pro-EU government against a rising