Isaac Pusey Gray (October 18, 1828 – February 14, 1895) was the 18th and 20th Governor of the U.S.
state of Indiana from 1880 to 1881 and from 1885 to 1889.
Originally a Republican, he oversaw the forceful passage of the post-American Civil War constitutional amendments whilst he was a member of the Indiana Senate.
He became a Democrat following the corruption of the Administration of Ulysses S.
Grant but was regularly stymied by his Democratic adversaries who constantly referred to his tactics while a Republican, earning him the nickname "Sisyphus of the Wabash."