Complex sentence: Pickman was elected as a Federalist to the Eleventh Congress (March 4,1809-March 3,1811), but he was not a candidate for renomination in 1810.
Split into simpler sentences: Pickman was elected as a Federalist to the Eleventh Congress (March 4,1809-March 3,1811). He was not a candidate for renomination in 1810.