Polish Prime Minister Donald Tusk casts his ballot as his wife Malgorzata looks on during the parliamentary elections in Warsaw, Poland, Sunday, Oct. 9, 2011. Poles are voting to determine whether the centrist Civic Platform party will win another term after four years of strong economic growth. But Prime Minister Donald Tusk's party is facing a tough challenge from Law and Justice, the conservative party of Jaroslaw Kaczynski. (AP Photo/Alik Keplicz)