The ruling right-wing Law and Justice (PiS) won re-election to a second term retaining its majority in the Sejm.

Following the 2015 parliamentary elections the Law and Justice (PiS) party was able to form a majority government, after receiving 235 seats to the 138 won by their main competitor, Civic Platform, the first time in the post-communist era that a party had won an outright majority in parliamentary elections.

On 23 December 2015 the Sejm passed a law, which reorganized the Constitutional Court, introducing a requirement for a two-thirds majority and the mandatory participation of at least 13, instead of 9 of the 15 judges.

[4] In protest, the Committee for the Defence of Democracy, with help from the Modern party and Civic Platform, started demonstrations across the country.

[7] Some politicians and commentators supporting Law and Justice accused opposition of attempting a "coup d'état".

[8] It ended fruitlessly for the opposition, though the Modern party was disgraced, as its leader, Ryszard Petru, was photographed flying to Madeira, with fellow MP Joanna Schmidt, during the tense situation.

[10] December 6, 2018 the Pro-Polish Coalition was formed[11][12] - an alliance of KORWiN and the National Movement, with more parties joining later in order to contest the 2019 Elections to the European Parliament.

[20] Elections can be held earlier under certain conditions, for instance, if the Sejm is dissolved or if no government is formed in time limit set by the constitution.