 When "Mot Dag" became a part of the Communist Party of Norway (NKP) in 1927, Hegna also became the editor for "Norges Kommunistblad" in a period.He left the party in 1929 along with most of the members of "Mot Dag".Between 1932 and 1936 he was also one of the editors of "Arbeidernes Leksikon".