Polish president, challenger face off in last debate ahead of tight election

Andrzej Duda, Presidential candidate of Law and Justice right wing opposition party, arrives to take part in the second debate in a tv studio between Polish president Bronislaw Komorowski ahead of the May 24 presidential runoff in Warsaw, Poland, Thursday, May 21, 2015. (AP Photo/Czarek Sokolowski) (The Associated Press)

Polish president Bronislaw Komorowski arrives to take part in the second debate at a tv studio with opposition candidate Andrzej Duda ahead of the May 24 presidential runoff in Warsaw, Poland, Thursday, May 21, 2015. (AP Photo/Czarek Sokolowski) (The Associated Press)

Supporters of Andrzej Duda react in front of a tv studio during the second debate between opposition candidate Andrzej Duda, and incumbent Bronislaw Komorowski ahead of the May 24 presidential runoff in Warsaw, Poland, Thursday, May 21, 2015.(AP Photo/Czarek Sokolowski) (The Associated Press)

Poland's President Bronislaw Komorowski and his challenger in a close election are facing off in a tense debate.

The debate is a final chance ahead of Sunday's balloting for the contenders to sway voters who still haven't decided if they want to re-elect Komorowski or replace him with Andrzej Duda, a 43-year-old lawyer and member of the European Parliament.

Komorowski, 62, has been a popular president and was long expected to easily win re-election. But now he appears to be suffering from a general disillusion among voters with the ruling Civic Platform party, which he is allied with.

At the start of the debate Thursday, Duda walked over to Komorowski and placed a small Civic Platform flag on his podium to remind voters of his links to the party.