October followed a similar script. The early favourite, Donald Tusk, leader of the PO, saw his opinion poll lead slip away and was beaten 54% to 46% in the second round by the PiS candidate Lech Kaczyński (one of the twins, founders of the party). Both elections were blighted by low turn-outs—only 51% in the second and deciding round of the presidential election, and just over 40% in the parliamentary election. The suggested cause of the low turnout is popular disillusionment with politicians. 2006 local elections 2007 parliamentary election In the October parliamentary elections, the Civic Platform (PO) won a stunning victory, the largest opposition party, which gained more than 41% of the popular vote. PiS's vote increased, from 2005, but insufficiently to gain reelection, whilst both Samoobrona and LPR were wiped out, losing all representation, each having gained only a little over 1% of the vote. PO proceeded to form a majority governing coalition with the agrarian Polish People's Party (PSL), with PO leader, Donald Tusk, taking over the prime ministerial office in November 2007. 2010 presidential election On 10 April 2010, many members of the political elite were killed in the Smolensk air crash, including Lech Kaczyński, acting President of Poland. At the presidential election in 2010, Donald Tusk decided not to present his candidature, considered easily winning over PiS leader Jarosław Kaczyński. At PO primary elections, Bronisław Komorowski defeated the Oxford-educated, PiS turncoat Foreign Minister Radosław Sikorski. At the polls, Komorowski defeated Jarosław Kaczyński, ensuring a PO dominance on all Polish political landscape. In November 2010, local elections granted about 31 percent of the votes and PiS at 23 percent, an increase for the former and a drop for the latter compared to the 2006 elections. PO succeeded in winning four consecutive elections a record in post-communist Poland. 2011 parliamentary election The parliamentary election to both the Sejm and the Senate was held on 9 October 2011. The previous election, in 2007, resulted in a Civic Platform–Polish People's Party (PSL) government. All seats of both houses were up for re-election. Civic Platform (PO), led by Prime Minister Donald Tusk, was aiming for re-election: a feat that hadn't been achieved since Poland became a democracy. The PSL was previously the smaller partner to the Civic Platform in the governing coalition, and had said that it wished to continue this relationship after the election. 2015 parliamentary election The parliamentary