Add Yahoo as a preferred source to see more of our stories on Google. The outgoing president, Andrzej Duda, has blocked much of Tusk's agenda. - Wojtek Radwanski/AFP/Getty Images Since winning power ...

(CNN) — 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 ...