[2] He also served briefly in 1841 as United States Postmaster General in the cabinet of William Henry Harrison.

[1] He then moved with his father to Canandaigua, New York, in 1814, where he studied law, was admitted to the bar in 1816 and commenced practice.

As a result, votes were split among Johnson, Granger, John Tyler and William Smith with none getting the majority.

[2] Harrison would win the presidency four years later in 1840 but Granger was not again his running mate and was instead replaced by John Tyler.

In 1841, Granger was appointed Postmaster General in the Cabinet of President William Henry Harrison and served from March 6 to September 18, 1841,[1] the day when almost all Whig Cabinet members left the government of new President John Tyler on the instruction of their party leader Henry Clay.

Chairman of the Whig National Executive Committee from 1856 to 1860, Granger joined in the call for the convention of the Constitutional Union Party that was held in May 1860.

He was then a member of the peace convention of 1861 held in Washington, D.C., in an effort to devise means to prevent the impending war.