Prussian House of Representatives
After the start of new era in 1858, he became a member of the Prussian House of Representatives. He was liberal, and was a member of the old liberal faction of Georg von Vincke. In many debates, Ronne participated. Since 1862, he was a member of the German Progress Party. He was one of the most important members of the party. He stood on a rather right wing. The constitutional conflict Ronne stood with his party in opposition to the government.