Jarosław Aleksander Kaczyński (Polish pronunciation: [jaˈrɔswaf kaˈt͡ʂɨj̃skʲi] (listen); born 18 June 1949) is a Polish politician who is currently serving as leader of the Law and Justice party (known by its Polish acronym PiS), which he co-founded in 2001 with his twin brother, Lech Kaczyński, who served as president of Poland until his death in 2010.
