Born September 27, 1912, he was a native of Pittsfield where his father, Lewis O. Haskell, was owner and publisher of the Pittsfield Advertiser.
When he was only two years old his father died and his mother took the family to Portland where Nathaniel graduated from Deering High School.
Determined to be a lawyer, he graduated from the Peabody Law School in 1934 and was admitted to the bar in March of the next year. For the remainder of his life he maintained an office at 97 Exchange Street in Portland.
In 1943, Haskell, a Republican, was elected to the Maine House of Representatives, reelected in 1945, 1947 and 1949 when he served as Speaker of the House. Elected to the Maine Senate in 1951, he was reelected in 1953 and in that same year elected President of the Senate.
Haskell served as President for the regular session only, resigning to accept the appointment as Probate Judge of Cumberland County.
Source: Maine State Senate.