Eaton voted in favor of the Tariff of 1824[8] and took part in the House caucus that nominated William Crawford for president.
[23][24][25][26] During the 1840 election for President, Eaton was a delegate to a convention of former Democratic-Republicans who endorsed Whig nominees William Henry Harrison and John Tyler.
[27] In 1841 he was a member of the reception committee for a large gathering in New York City which honored Nathaniel P. Tallmadge following his return to the United States Senate after having switched from the Democratic Party to the Whigs.
[28] In the early 1840s he served as a Special Agent of the United States Post Office Department, ensuring that postmasters and mail carriers did not use the service for illegal purposes.
He was originally interred at Black Rock Burial Ground, and most of the remains there, including Eaton's, were later moved to Buffalo's Forest Lawn Cemetery.