To date four people have served as acting President : Maciej Rataj who did so twice , Bronisław Komorowski , Bogdan Borusewicz and Grzegorz Schetyna . Rataj , Komorowski and Schetyna were Marshals of the Sejm , and Borusewicz the Speaker of the Senate . Rataj 's first term was between the assassination of President Gabriel Narutowicz and the election of Stanisław Wojciechowski , December 16 – 22 , 1922 , the second between the resignation of President Wojciechowski and the election of Ignacy Mościcki , May 15 – June 4 , 1926 . Both times he appointed a new cabinet . Komorowski became acting President on April 10 , 2010 , following the death of President Lech Kaczyński in a plane crash . On July 8 , 2010 Poland had three different acting Presidents . Komorowski ( having won the new presidential elections ) resigned as Speaker of the Sejm in the morning , and Borusewicz , who served as the speaker of the Senate took over as acting president for several hours , until Schetyna was confirmed as new Speaker of the Sejm and the new acting president
a plane crash
2010 Polish Air Force Tu-154 crash
Acting President of Poland