In April 1924, Dempsey was appointed to an executive position in the Irish Worker League (IWL). The IWL was a Soviet-backed Communist group founded in Dublin by Irish labour leader Jim Larkin.
In April 1924, Dempsey .was appointed to an executive position in the Irish Worker League (IWL) The IWL was a Soviet-backed Communist group founded in Dublin by Irish labour leader Jim Larkin.