Complex sentence: He moved up to the United States House of Representatives for a single term (1827--1829), then returned to Missouri to sit in the State Senate from 1831 to 1835, then again in the Missouri House from 1835.
Split into simpler sentences: He moved up to the United States House of Representatives for a single term (1827--1829). He was elected to the State Senate from 1831 to 1835, then to the Missouri House from 1835.