However, on 5 March, the proposal was referred to the Constitutional Tribunal of the Republic of Poland by the Polish President, Lech Kaczyński.

[1] As anticipated, the Civic Platform (PO) won a significant victory, winning more than 44% of the vote and gaining half of the total seats.

PO's vote was higher than their 41.5% achieved at the 2007 Polish parliamentary election, and to date was the highest vote achieved by a Polish political party to either the Sejm (national legislature) or the European Parliament.

At one time, the biggest party in Poland, the Democratic Left Alliance's vote was fairly static over the past five years, and they have been unable to challenge the dominance of PO and PiS, since 2005.

The remaining parties failed to reach the 5% threshold required to win seats.