Liberal Warsaw Mayor Rafal Trzaskowski seeks to upset conservative incumbent Andrzej Duda, who has railed against Jewish wartime compensation claims as part of his campaign

Right-winger Andrzej Duda seeking second term in office backed by Law and Justice party, which has triggered tensions with Europe over controversial laws

President Duda has equated 'LGBT ideology' with communism, while public television has attacked his main rival for being open to discussing Holocaust compensation

Far-right sponsored legislation sought to prohibit claims from heirs of Jews who were killed in the Holocaust

Marian Turski says the Holocaust didn't 'fall from the sky' but came after growing acceptance for discrimination against minorities; remarks seen as aimed at nationalist government

Some marchers shout anti-communist and homophobic statements; slogan on tent denounces Jewish community for demanding Holocaust reparations

Results indicate the opposition will have a tool to prevent the ruling party from rushing through legislation

Critics fear the faction could reverse country's recent democratic achievements, including by hampering judiciary and marginalizing minorities

A strong win by the Law and Justice party could enable it to proceed with court reforms that risk undermining judicial independence and the rule of law

Amid concerns for country's democracy, ruling Law and Justice party expected to easily pick up most votes, but could lose parliamentary majority