Former Minister of Aviation, Femi Fani-Kayode has claimed that President Muhammadu Buhari referring to Vice President Yemi
Osinbajo as a “co-ordinator” and not Acting President, is “insulting and dangerous”.
Buhari flew out of the country Sunday night, to undergo further medical check-ups in the UK. But before then, he sent a letter to the Senate notifying the upper chamber of his absence.

The Senator representing Abia-North at the National Assembly, Mao Ohuabunwa, on Tuesday, said the transfer of power from Buhari to Yemi Osinbajo was not clear.
Ohuabunwa faulted the letter http://www.mcebisco.com.ng/2017/05/buhari-insulted-osinbajo-before-leaving.html

I'm yet to see the big deal here.