Question: Stuart Smalley is a fictional character invented and performed by comedian and satirist (and later United States Senator from Minnesota) who is this American writer, comedian, and politician? 
Sentence (from "USRC Harriet Lane (1857)"): The cutter was christened and entered the water for the Revenue Service in 1859 out of New York City, and saw action during the Civil War at Fort Sumter, New Orleans, Galveston, Texas, and Virginia Point and was captured by the Confederates in 1863, whereupon she was converted to a trade ship.
Relevant evidence: No