Abiodun, an All Progressives Congress, APC member, is one of the 11 governors seeking reelection on Saturday.
Okupe, Director-General of Obi's Campaign, was seen disembarking from a jet with Abiodun in a video circulating on social media.
The video sent waves of shock on social media as some supporters of Obi alleged that Okupe worked for Asiwaju Bola Tinubu of the APC in the election.
Others claimed he abandoned Obi after the election.
In December last year, A Federal High Court in Abuja jailed Okupe for two years with an option of fine.
However, Okupe, on his official Twitter handle, explained that political opponents are not enemies but just competitors in the landscape.
“I don't play politics of enmity based on political differences. Political opponents are not enemies but Just competitors.
Many PDP & APC chieftains are personal friends & long-standing associates.
Femi Gbajabiamila was a special guest of honour at my book launch. His mum is my aunt”, he posted.