Elected Sejm member the same year, he became chairman of the PPS caucus, replacing Norbert Barlicki in 1926.
Marek Janowski | Zygmunt Bauman | Marek Halter | Zygmunt Krasiński | Marek Wolf | Zygmunt Pieda | Marek Wolf (physicist) | Marek Niedźwiecki | '''Zygmunt Zaremba''' as a witness during court proceedings (Brest trials | Zygmunt Staszczyk | Zygmunt Smalcerz | Zygmunt Puławski | Zygmunt Krauze | Marek Gazdzicki | John Marek (politician) | John Marek | Zygmunt Waliszewski | Zygmunt Steuermann | Zygmunt Latoszewski | Tadek Marek | Richard Marek | PFC Marek Dupnitsa | Marek Weber | Marek Štryncl | Marek Rutkiewicz | Marek Piwowski | Marek Papała | Marek Mikulski | Marek Mazanec | Marek Krajewski |