After a short period of study in Paris on the French Revolution, he spent some time working in the archives of Baden and Bavaria, and published in 1845 Die Geschichte der rheinischen Pfalz, which won for him a professorship extraordinarius at Heidelberg.

Häusser also interested himself in politics while at Heidelberg, publishing in 1846 Schleswig-Holstein, Danemark und Deutschland, and editing with Gervinus the Deutsche Zeitung.

In 1848 he was elected to the lower legislative chamber of Baden, and in 1850 advocated the project of union with Prussia at the parliament held at Erfurt.

In 1859 he again took part in politics, resuming his place in the lower chamber, opposing in 1863 the project of Austria for the reform of the Confederation brought forward in the assembly of princes at Frankfort, in his book Die Reform des deutschen Bundestages, and becoming one of the leaders of the little German (kleindeutsche) party, which advocated the exclusion of Austria from Germany.

), Häusser's lectures have been edited by Wilhelm Oncken in the Geschichte des Zeitalters der Reformation[1] (1868, 2nd ed.