Complex sentence: He was elected as a Democratic-Republican to the United States House of Representatives from New Jersey and served from March 4,1807 to March 3,1813, but was not re-elected to the United States House of Representatives in 1812.
Split into simpler sentences: He was elected as a Democratic-Republican to the United States House of Representatives from New Jersey and served from March 4,1807 to March 3,1813. He failed to be re-elected to the United States House of Representatives in 1812.