In addition to teaching, Vischer later tested the mettle of the politics of his time. More out of a sense of duty than out of ambition, he became a member of parliament for the left-wing democrats in the National Assembly in St. Paul's Church in Frankfurt, and was involved in the Stuttgart rump parliament of 1849. His commitment and spirited clashes with Pietism were not exactly beneficial to his standing in Tübingen society, which led him to "emigrate" to Zurich Polytechnic in 1855.