Yes I Bukusu are dominant tribe of Likuyani - which is why Dr Enock Wamalwa Kibunguchy -a Bukusu - was a long serving Mp of the area. The other luhyas - are mix-mature. The current drunkard and jirongo (a tiriki) were probably benefited from a splintered Bukusu votes.
The current drunkard Mp - I am not sure of his subtribe - opps confusing Lugari with Likuyani.
It appears Lugari - is mixture - maragolis and tirikis - maybe the majority