As Governor, Clark was noted for his meddling with militia appointments, causing the resignation of the state Adjutant General John Watts de Peyster.

[citation needed] In 1862, President Abraham Lincoln appointed Clark the first Collector of Internal Revenue of in the Ontario County district.

His steadfast advocating of temperance led to his nomination on the Prohibition ticket to run again for Governor at the New York state election, 1874.

[6] He finished in third place, behind Democrat Samuel J. Tilden and the incumbent Republican Governor John Adams Dix.

[8] Together, they were the parents of five children, one son and four daughters, including:[1] Clark died in Canandaigua, New York on August 23, 1892.