He was first elected to Dáil Éireann as a Cumann na nGaedheal Teachta Dála (TD) for the Monaghan constituency at the 1923 general election.
[1] He lost his seat at the June 1927 general election.
[2] Duffy was born in Doohamlet, near Castleblayney in County Monaghan.
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