Complex sentence: Later he became a Democratic Party politician, elected in 1874 to the Mississippi State Senate, and in 1876 from Mississippi's 6th congressional district to the US House of Representatives, where he served from 1877 from until 1881.
Split into simpler sentences: Later he became a Democratic Party politician, elected in 1874 to the Mississippi State Senate. In 1876 he was elected from Mississippi's 6th congressional district to the US House of Representatives, where he served from 1877 from until 1881.