Rubuta ci gaba ga wannan sakin layi - shirin Roosevelt na shawo kan Hoover don yin takarar dan takarar Democrat ya fadi bayan Hoover ya bayyana kansa a fili ya zama dan Republican, amma Roosevelt duk da haka ya yanke shawarar neman takarar mataimakin shugaban kasa na 1920. Bayan Gwamna James M. Cox na Ohio ya lashe zaben shugaban kasa na jam'iyyar a 1920 Democratic National Convention
, ya zabi Roosevelt a matsayin mataimakinsa, kuma jam'iyyar ta zabi Roosevelt ta hanyar yabo. Ko da yake sunansa ya ba da mamaki ga mafi yawan mutane, Roosevelt ya daidaita tikitin a matsayin mai tsaka-tsaki, Wilsonian, da kuma haramtacciyar haramtacciya tare da sanannen suna. Roosevelt ya cika shekaru 38, shekaru hudu da suka wuce fiye da Theodore lokacin da ya karbi wannan zabi daga jam'iyyarsa. Roosevelt ya yi murabus a matsayin Mataimakin Sakataren Sojojin Ruwa bayan taron Jam'iyyar Democrat kuma ya yi yakin neman zabe a fadin kasar don tikitin Cox <unk> Roosevelt.