According to her official biography on the Schiller Institute website, she traveled with her husband to promote his proposals for monetary reform and large-scale infrastructural development, and met with former Indian prime minister Indira Gandhi and former Mexican president José López Portillo.

[5] She returned to Mexico in 1998, and participated as mistress of ceremonies at a conference held at the Academy of Economics of the Mexican Society of Geography, during which Lopez Portillo greeted her once again, according to the LaRouche movement's Executive Intelligence Review.

[7][8] Earlier that year, Lopez Portillo, along with former Ugandan President Godfrey Binaisa, former Algerian Prime Minister Abdelhamid Brahimi and other politicians, had added his signature to a call issued by Zepp-LaRouche for a "new just world economic order.

ISBN 0-933488-37-8) She founded the Schiller Institute in the same year,[1] saying: "We need a movement that can finally free Germany from the control of the Versailles and Yalta treaties, thanks to which we have staggered from one catastrophe to another for an entire century.

Zepp-LaRouche's presentation was later published in 2007 in the Russian magazine Forum International, in an issue devoted to the “Megaprojects of Russia’s East” conference on the Bering Strait crossing.

She said that the accelerating collapse of the transatlantic system is driving the danger of a new world war, and that US and European liquidity expansion measures have led to a hyper-inflationary printing of money, with its “life-shortening effect” upon millions of people in Greece, Italy, Spain and Portugal.

[18] On 24 February 2021, Zepp-LaRouche denounced the LaRouche Political Action Committee (LPAC) and its treasurer, Barbara Boyd, for going "in a direction which I consider contrary to the central policies that my husband stood for.