Rubuta ci gaba don wannan sakin layi - A 1918, Democrat McGlennon, to, shugaban mafi rinjaye na majalisar dattijai na jihar, ya ci Republican William Ross da kuri'u 299 kawai daga cikin kuri'u 25,000. McGlennon ya kasance wakilin da aka zaba a majalisar wakilai ta 66 na Amurka (4 ga Maris, 1919 <unk> 3 ga Maris, 1921), wanda ke wakiltar gundumar majalisa ta 8 na New Jersey a majalisar wakilai ta Amurka, amma ya kasance dan takarar da bai yi nasara ba don sake zabarsa a shekarar 1920 zuwa majalisar wakilai ta 67 na Amurka. Ya yi aiki a matsayin wakili a 1920 Democratic National Convention
Ka yi haƙuri. A shekara ta 1924, an nada shi alƙali na New Jersey Court of Errors and Appeals kuma ya yi aiki har zuwa mutuwarsa. Cornelius kuma ya kasance mai kula da shugabanci a Harrison, New Jersey daga 1926 zuwa 1931.