Romanian President-elect Nicusor Dan has returned a favor to political allies in Poland, addressing a mass rally in Warsaw in support of pro-EU presidential candidate Rafal Trzaskowski on May 25.

Tens of thousands of Poles rallied in Warsaw's dueling marches, supporting presidential candidates Rafal Trzaskowski and Karol Nawrocki. Trzaskowski, pro-EU, emphasized inclusion, while Nawrocki, backed by the conservative Law and Justice party,

Pro-EU candidate Rafal Trzaskowski rallies supporters in Warsaw ahead of the critical June 1 election runoff against nationalist Karol Nawrocki.- Watch Video on English Oneindia

An exit poll shows that the liberal Warsaw mayor, Rafal Trzaskowski, and a conservative historian, Karol Nawrocki, are the front-runners in a presidential election in Poland on Sunday.

The other, from the centre, is that, in a dangerous world, Poland needs Europe to magnify its strengths, just as Europe needs Poland as a source of security and economic dynamism. Unfortunately, at the moment the right may have the upper hand.

Rafal Trzaskowski, the Warsaw mayor, appeared to have won the first round of the election. Prime Minister Donald Tusk is hoping his eventual victory will help push through a liberal agenda.

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 is looking into whether any explosive devices were planted where a ship from Russia's "shadow fleet" was seen moving suspiciously near a power cable linking Poland with Sweden, Polish Prime Minister Donald Tusk said.