Wagner was elected deputy of the Yvelines during the French legislative elections in 1986, under the colours of the Rassemblement national which gathered members of the National Front and candidates supported by Jean-Marie Le Pen's party.
In the French legislative elections of 1986, Wagner was elected a deputy for Yvelines, representing the colors of the Rassemblement national, an alliance that included supporters from the National Front and those backed by Jean-Marie Le Pen’s political group.