1998 he was a member of the Landtag ( state parliament ) of North Rhine-Westphalia . From 1992 to 1995 he was Secretary of Social affairs in the State of North Rhine-Westphalia . He was a member of the Bundestag from 1975 to 1992 and again since 1998 ; from 1995 to 1998 he was a member of the Landtag ( state parliament ) of North Rhine-Westphalia .