“ 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. ”

“ 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. In 1850 he became professor ordinarius. Häusser also interested himself in politics while at Heidelberg, publishing in 1846 Schleswig-Holstein, Dänemark und Deutschland, and editing with Gervinus the Deutsche Zeitung. ”