Trafton was elected as the candidate of the American Party (aka the
Know-Nothing Party) to the
Thirty-fourth Congress (March 4, 1855 – March 3, 1857). All eleven U.S. Representatives in the Massachusetts delegation were members of the American Party, including Speaker of the House
Nathaniel P. Banks. According to his
New York Times obituary, Trafton "had been an active leader in the anti-slavery reform, and while a member of Congress he secured the cordial hate of his opponents by his bold assaults upon the slave power". He was an unsuccessful candidate for reelection in 1856 to the
Thirty-fifth Congress, and resumed his ministerial duties as pastor of a church in
Mount Wollaston, Massachusetts. == Career as a Clergyman ==