Nigeria, March 20 -- President Bola Ahmed Tinubu's proclamation of emergency rule in Rivers State on Tuesday surprised me for reasons different from those for which he has been severely criticised.

The mildest criticism is that Tinubu's failure to call the Minister of the Federal Capital Territory, Nyesom Wike, to order was responsible for the crisis. The more severe criticisms range from accusations that the president has subverted constitutional rule to charges of potential destabilisation at the behest of Wike.

A common point of agreement is that a civilian president should never have to declare emergency rule. That is the ideal. But Rivers State before Tuesday presented a dire and complicated situation that stretched idealism to its...