Complex sentence: In 1810 he was elected to fill the vacancy caused by the death of U.S. Senator Samuel White, was reelected in 1814, and served from January 12,1810, seated January 29,1810.
Split into simpler sentences: In 1810 he was elected to the U.S. Senate to fill the vacancy caused by the death of U.S. Senator Samuel White. He was reelected in 1814, and served from January 12,1810, seated January 29,1810.