Asa William Henrt Clapp (1805-1891) a U.S. Representative was born in Portland on March 6, 1805, and was graduated from the Norwich (Vermont) Military Academy in 1823. He engaged as a merchant in foreign and domestic commerce at Portland.
In the early 1820s, he owned what was to become the McLellan-Sweat Mansion, now a National Historic Landmark in Portland.
Elected as a Democrat to the Thirtieth Congress (March 4, 1847-March 3, 1849), Clapp was not a candidate for renomination in 1848, though he was a delegate to the Democratic National Convention in 1848 and 1852.
He resumed his former business pursuits; served as a director of the Maine General Hospital and of the Portland Public Library until his death in Portland on March 22, 1891, with interment in Evergreen Cemetery.