The blow comes from Maendeleo Chap Chap's own Francis Kavyu, the elected MCA and County Minority Leader, who has publicly severed ties with President William Ruto.
In a dramatic U turn, Kavyu launched a scathing critique of the national administration, dismissing President Ruto's flagship Singapore dream as a deceptive scheme.
He instead threw his full weight behind Wiper leader Kalonzo Musyoka, declaring him the right candidate to become Kenya's 6th President.
His defection is particularly stinging due to his pledge to mobilise support to send President Ruto home, accusing the head of state of peddling sweetened lies and empty promises designed to hoodwink the public.
Kavyu, a youthful and firebrand politician, is now eyeing the Mavoko parliamentary seat on a Wiper ticket, marking a full scale political crossover.
The move has sent shockwaves through the camp of Machakos Governor Dr. Alfred Mutua, Kavyu's former party leader in Chap Chap, leaving them back at the drawing board politically.
This defection not only weakens Kenya Kwanza's grassroots presence in a crucial county but also strengthens Kalonzo Musyoka's machinery ahead of the next electoral cycle, framing a potent narrative of disillusionment with the national government.