The election is an individual triumph for Civic Platform leader Donald Tusk.

Latest opinion polls give Law and Justice a marginal lead over Civic Platform.

Tusk's Civic Platform party matters to investors in Poland, eastern Europe's biggest economy.

The youth vote helped ensure victory for the centrist and pro-European Civic Platform.

Lech Kaczyński remained as president, dedicating himself to frustrating the Civic Platform-led government.