Complex sentence: He was defeated for a seat in the state Senate in 1846 by a single vote; he continued his service in the House until 1850, when he won election to the Senate representing Monroe and Barren counties.
Split into simpler sentences: He was defeated for a seat in the state Senate in 1846 by a single vote. He continued serving in the House until 1850, when he won election to the Senate representing Monroe and Barren counties.