Original: For several years he was a member of the National-Democratic Party and the National Party, which merged with several other organizations to form the League of Polish Families (Liga Polskich Rodzin, LPR) in 2001.
Simplified: For several years he was a member of the National-Democratic Party (Stronnictwo Narodowo-Demokratyczne) and the National Party (Stronnictwo Narodowe), which went with several other organizations to form the League of Polish Families (Liga Polskich Rodzin, LPR) in 2001.