Career
He served in the United States. Congress from January 29, 1889, to March 3, 1889. He was elected to fill the vacancy created by the resignation of Alvin P. Hovey, who had been elected Governor of Indiana. Posey was defeated for re-election to the United States. Congress.
He also ran unsuccessfully for other offices, including the Indiana state Senate.
Posey was also an elector on the James Garfield ticket in 1880.