It was a defeat for president Kibaki

"... in a mature political system, if a person pushes something (Wako Mongrel) very hard as the President(Kibaki) did, then people reject it, then it is defeat for the person and his administration. Although it is difficult to explain why people voted the way they did because not everybody votes for the same reasons". Sir Yash Pal Ghai, The East African Standard December 29, 2005

Comment: Simply put, kenyans have lost confident in Kibakis Administration adn wants him to leave. Thats what the professor is trying to say.