Who is the leader of Poland?

-the Head-of-State is a President of the Republic of Poland.
After the death of former president Lech Kaczynski, the post is temporary occupied by the parliament's speaker Grzegorz Schetyna.
New president, Bronislaw Komorowski is already chosen as a President-elect waiting for his oath.
-The second and third most important persons are speakers of both houses of parliament: Sejm (Grzegorz Schetyna) and Senat (Bogdan Borusewicz)
-But the leading role in political life always wields the Prime Minister of Poland, currently Donald Tusk.