President Andrzej Duda nominated Antoni Macierewicz to become the Senior Marshal of the Sejm, and Barbara Borys-Damięcka - the Senior Marshal of the Senate - spokesperson for the President, Błażej Spychalski, informed on Tuesday. "I shall be carrying out my duties with the sense of responsibility for Poland's entire struggle for independence, and the Polish nation's decision expressed in the recent elections," Macierewicz said.