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Abraham Schermerhorn was the mayor of Rochester, NY from 1840-1842. He then became a member of the New York state legislature.

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From Wikipedia:

Abraham Maus Schermerhorn (December 11, 1791 – August 22, 1855) was the third mayor of Rochester, New York and a United States Representative from New York.

Born in Schenectady, he completed preparatory studies and graduated from Union College in 1810. He studied law, was admitted to the bar in 1812, and in 1813 moved to Rochester.[1] He became the "money king" of the Genesee region as the secretary of Rochester's first bank before becoming a supervisor of the city in 1834. In 1837 Schermerhorn became the third mayor of Rochester but resigned after two months to become secretary to the New York State Senate.[2] He became a member of the New York State Assembly (Monroe Co., 2nd D.) in 1848, and was elected as a Whig to the Thirty-first and Thirty-second Congresses, representing New York's 28th congressional district holding office from March 4, 1849 to March 3, 1853. In 1855 he died at Savin Rock, near West Haven, Connecticut. He was interred in Mount Hope Cemetery, Rochester.

From Schermerhorn Genealogy and Family Chronicles, p. 108

"Abraham Maus Schermerhorn was graduated from Union College, Schnectady, with high standing. He received degrees of A. B. and A M., and was elected to Phi Beta Kappa. In 1818, he removed to Cheery Valley and was appointed cashier of the Cheery Valley Bank, a new institution. Banking in teh State, west of Albany, was then in its infancy. He had the entire management of the business, discharged the various duties of bookkeeper, teller, cashier, president, and director, and so conducted the affairs of the bank as to seure a high reputation as a successful banker. He remained there until 1824, when the charter of the Bank of Rochester was obtained and then removed, upon invitation, to the (then) Village of Rochester, and became the first cashier of the new Bank, which position he occupied with distinctive ability until 1829, when the Bank of Monroe was chartered (an institution of much larger capital than the Bank of Rochester), and became its president. He presided over it several years and was regarded, if not the foremost banker, at least one of the foremost bankers in western New York.

In 1834, he was one of the three Supervisors of Rochester, when the city charter was granted. In 1836, he was elected Mayor of the city, but served only three months. In 1848, he was elected to the U. S. Congress and was re-elected in 1850, continuing to represent the district for four years. He was regarded at Washington as a clear-headed business member.

Extract from Reminiscences of Levi Beardsley, 1852, N. Y.: "The bank (Central Bank of Cherry Valley) went into operation in the autumn of that year (1818) under the auspices of Abraham M. Schermerhorn, as cashier, who is a member of the present Congress from Rochester, Monroe Co., and was also a member of the last. Mr. Schermerhorn was a man of decided talents, managed the bank with great ability, and finally went to Rochester, six years afterwards, where for many years he was the leading and most popular financier in western New York. He is shrewd, kind-hearted, sincere and ardent in his friendships, and I have always regarded him as a high-minded, honorable and honest man."