i know you are looking to paint it as PNU confusion but Azimio is NARC... which was a coalition party of Rainbow, DP, Ford-K, etc. Individually they would have been beat by KANU but umoja ni nguvu. All those Jubilee, PNU/Mbus, UDM/Upya, DAP-K, PAA - come with good following. They are not Raila briefcase at all.
Ruto Jubilee "mean machine" was collection of such parties with TNA & URP as senior partners. ODM, JP, Wiper will be the senior partners. Kenya boils down tp who bags PORK - MPs are only loyal to the politics of the day as has been so clear in that 12th parliament.