Gore assented to the Treaty of Ghent that ended the war , but was unhappy that the nation had not gained anything from the war . He resigned in June 1816 , unhappy with the politics of Washington and suffering from poor health . Although he was no longer active in politics , he continued to express opinions on the subjects of the day , opposing the 1820 Missouri Compromise and bemoaning the " great moderation & mediocrity " of Federalist Governor John Brooks .