A critical political mind would easily suspect Ribadu's candidacy going from his antecedents with Baba. Is this a strategic game plan or what.

OBJ is pro-North.
Ribadu is pro-North.
Nuhu Ribadu is a Northerner.
So he cannot be a political pun in ACN against the North.

Answer: No.

Maybe a political pun against the South. But not the North.

Ribadu = OBJ is a win-win situation for both the ACN and the North. A detriment to the South.

ACN is supposed to be a western stronghold.

But then, evidences have proved that obj is solidly behind goodluck jonathan's ambition.

ribadu is obj's plan b. might jonathan fail to secure the pdp ticket, there will be a replay of imo state 2007 at the national levels.
in imo state pdp prmaries, eng. charles ugwu was obj's candidate but cld only come 5th while an anti obj candidate in the name of senator ifeanyi ararume won the pdp ticket. obj's madness in using the 5th candidate was caught short when ararume went to court.
what obj did at the end of the day was to declare that pdp was no longer interested in imo state governorship election.
on the other hand, a less priviledged ohakim was used via ppa with the agreement to cross carpet as soon as he became the gov and that is the situation in imo state as we speak.
ribadu was surposed to be a fugitive who ran away from the arms of the laws but obj's inordinate ambition to remain relevant and have his trusted comrades arround the corridors of power forcefully brought him back.
the idea here is if jonathan fails at the primaries, ribadu will be used via the other party acn been a northerner to make sure his opositions like atiku will not have their way.

What is a political pun?

Nairalanders go soon murder the English language.

"political pun" in parenthesis. You know 'political' . Fine. If u know the game of chess, the word 'pun' would be familiar to you.