Despite his misgivings, Kronberg believed LaRouche was a genius. Klein writes that Kronberg "rationalized his leader's seemingly crackpot ideas," telling family members that LaRouche didn't really believe all the things he was saying. In 1974, Kronberg became a national committee member of the National Caucus of Labor Committees (NCLC), part of the LaRouche movement. He was the production editor of their newspaper, "New Solidarity", edited their magazine, "The Campaigner", and later co-founded and edited "Fidelio", a publication of LaRouche's Schiller Institute. He was a founding board member of Caucus Distributors, one of the key LaRouche companies. In 1978, he founded World Composition Services, which typeset material for LaRouche; according to Klein, Kronberg's companies also worked for other clients such as the United Nations and the Ford Foundation, as "low-cost printing" for LaRouche in reality often meant "free printing".