Complex sentence: After the War, he served as Congressman from the fifth district of Maryland from 1815 to 1816, and as a U.S. Senator from Maryland from 1819 until his death in 1822.
Split into simpler sentences: After the War, he served as Congressman from the fifth district of Maryland from 1815 to 1816. He served as a U.S. Senator from Maryland from 1819 until his death in 1822.