Federal Labour Minister Seamus O'Regan announced Thursday he's resigning from cabinet and won't seek reelection. Enlarge image (new window) Prime Minister Justin Trudeau congratulates then-veterans Affairs Minister Seamus O'Regan at a swearing-in ceremony at Rideau Hall in Ottawa on Aug. 28, 2017. He has served very capably in every job that the prime minister has given him, most recently as our minister of labour. WATCH: Minister Blair reacts to Liberal labour minister leaving cabinetDébut du widget Widget. Fin du widget Widget.