Answer
Cotta's Allgemeine Zeitung moved from Tübingen via Stuttgart to Ulm due to political reasons. The Zeitung was a pro-liberal newspaper and the government of Württemberg, which Tübingen and Stuttgart are in, was conservative. In 1848, the government tried to suppress the newspaper by cutting its subsidies and limiting its circulation. The Zeitung then moved to Ulm, which was in a more liberal state.