Tuhia he tomokanga mō tēnei wāhanga - I muri i tana wehenga mai i te Pāremata, ka tīmata anō a O'Brien i te whakahaere i ōna hiahia pakihi. I mahi ia hei karere ki te Democratic National Convention i te tau 1916
He aha? I mate ia i Brooklyn i te Mahuru 2, 1924, ka tanumia ki Holy Cross Cemetery.