His presidency is generally ranked as one of the least successful, despite achievements like the Webster–Ashburton treaty which heralded the prospect of improved relations with Great Britain, and the annexation of Texas, which added millions of acres to the national domain."Seager, p. xiii:

"Yet John Tyler has become one of America's most obscure Chief Executives. His countrymen generally remember him, if they have heard of him at all, as the rhyming end of a catchy campaign slogan."ibid, p. xvi:

"Yet I find him to be a courageous, principled man, a fair and honest fighter for his beliefs. He was a President without a party.""True, he was neither a great President nor a great intellectual. ... Save for the success of his Texas policy and his Maine Boundary treaty with Great Britain, his administration has been and must be counted an unsuccessful one by any modern measure of accomplishment."^ Affairs of State: The Untold History of Presidential Love, Sex, and Scandal, 1789–1900 by Robert P. Watson, Lynn University, 2012.  Pg. 