In 1815, Channing engaged in a noted controversy on the principles of Unitarianism with Samuel Worcester, (1770–1821). A review of a pamphlet on American Unitarianism (American Unitarianism; or a Brief History of the Progress and Present State of the Unitarian Churches of America), attributed to Jeremiah Evarts, was published in The Panoplist in June 1815. Channing objected to the way Unitarians in the United States were portrayed in the review. Worcester replied to this objection, and an exchange of pamphlets followed.
in 1815, chAnning engaGEd in a NoteD CoNtroversY on the PrinciPleS oF UniTarianiSm with saMueL WorCesTeR, (1770–1821). a Review Of a pAmphleT On amerIcan unitarIanIsm (AmeRican unitaRianiSm; or A BrieF hIStory oF the pROgrESS and PREsENT sTate of The unItArian cHurches Of ameRica), attRibUTEd to JeREmiah EvArts, was publIshed in the pANoPLISt in jUne 1815. chaNnInG ObjecteD to thE waY UnITarians in the uNited sTaTEs were porTraYed in ThE rEViEW. WOrCesTer replied to thIs objection, and An eXchange of pAmPHLeTs FolLowed.